diff --git a/client/src/app-components/language-selector.js b/client/src/app-components/language-selector.js
index 14ab8012..cacb0d8e 100644
--- a/client/src/app-components/language-selector.js
+++ b/client/src/app-components/language-selector.js
@@ -3,6 +3,7 @@ import {connect} from 'react-redux';
 import classNames from 'classnames';
 
 import languageList from 'data/language-list';
+import i18n from 'lib-app/i18n';
 import DropDown from 'core-components/drop-down';
 
 const languageCodes = Object.keys(languageList);
@@ -10,13 +11,15 @@ const languageCodes = Object.keys(languageList);
 class LanguageSelector extends React.Component {
     static propTypes = {
         value: React.PropTypes.oneOf(languageCodes),
-        type: React.PropTypes.oneOf(['allowed', 'supported']),
+        type: React.PropTypes.oneOf(['allowed', 'supported', 'custom']),
+        customList: React.PropTypes.array,
         allowedLanguages: React.PropTypes.array,
         supportedLanguages: React.PropTypes.array
     };
 
     static defaultProps = {
         type: 'allowed',
+        customList: ['en'],
         allowedLanguages: languageCodes,
         supportedLanguages: languageCodes
     };
@@ -75,7 +78,14 @@ class LanguageSelector extends React.Component {
     }
 
     getLanguageList() {
-        return (this.props.type === 'supported') ? this.props.supportedLanguages : this.props.allowedLanguages;
+        switch(this.props.type) {
+            case 'supported':
+                return this.props.supportedLanguages;
+            case 'allowed':
+                return this.props.supportedLanguages;
+            case 'custom':
+                return this.props.customList;
+        }
     }
 }
 
diff --git a/client/src/app-components/toggle-button.scss b/client/src/app-components/toggle-button.scss
index 4711e8fe..6006ae56 100644
--- a/client/src/app-components/toggle-button.scss
+++ b/client/src/app-components/toggle-button.scss
@@ -6,4 +6,5 @@
     padding: 2px;
     border-radius: 4px;
     text-align: center;
+    user-select: none;
 }
\ No newline at end of file
diff --git a/client/src/app/admin/panel/settings/admin-panel-system-preferences.js b/client/src/app/admin/panel/settings/admin-panel-system-preferences.js
index 03ed99a7..dac728dc 100644
--- a/client/src/app/admin/panel/settings/admin-panel-system-preferences.js
+++ b/client/src/app/admin/panel/settings/admin-panel-system-preferences.js
@@ -1,5 +1,10 @@
 import React from 'react';
 import _ from 'lodash';
+
+import API from 'lib-app/api-call';
+import i18n from 'lib-app/i18n';
+import LanguageSelector from 'app-components/language-selector';
+import ToggleButton from 'app-components/toggle-button';
 import languageList from 'data/language-list';
 
 import Form from 'core-components/form';
@@ -8,11 +13,9 @@ import Header from 'core-components/header';
 import SubmitButton from 'core-components/submit-button';
 import Button from 'core-components/button';
 import Message from 'core-components/message';
+import InfoTooltip from 'core-components/info-tooltip';
 
-import API from 'lib-app/api-call';
-import i18n from 'lib-app/i18n';
-import LanguageSelector from 'app-components/language-selector';
-import ToggleButton from 'app-components/toggle-button';
+const languageKeys = Object.keys(languageList);
 
 class AdminPanelSystemPreferences extends React.Component {
 
@@ -20,7 +23,7 @@ class AdminPanelSystemPreferences extends React.Component {
         loading: true,
         message: null,
         values: {
-            'maintenance': false
+            maintenance: false
         }
     };
 
@@ -31,12 +34,12 @@ class AdminPanelSystemPreferences extends React.Component {
     render() {
         return (
             <div className="admin-panel-system-preferences">
-                <Header title={i18n('SYSTEM_PREFERENCES')} description="Here you can adjust your system preferences :)"/>
-                <Form values={this.state.values} onChange={values => this.setState({values, message: null})} onSubmit={this.onSubmit.bind(this)} loading={this.state.loading}>
+                <Header title={i18n('SYSTEM_PREFERENCES')} description={i18n('SYSTEM_PREFERENCES_DESCRIPTION')}/>
+                <Form values={this.state.values} onChange={this.onFormChange.bind(this)} onSubmit={this.onSubmit.bind(this)} loading={this.state.loading}>
                     <div className="row">
                         <div className="col-md-12">
                             <div className="admin-panel-system-preferences__maintenance">
-                                <span>Maintenance Mode</span>
+                                <span>{i18n('MAINTENANCE_MODE')} <InfoTooltip text={i18n('MAINTENANCE_MODE_INFO')} /></span>
                                 <FormField className="admin-panel-system-preferences__maintenance-field" name="maintenance-mode" decorator={ToggleButton}/>
                             </div>
                         </div>
@@ -48,11 +51,11 @@ class AdminPanelSystemPreferences extends React.Component {
                     </div>
                     <div className="row">
                         <div className="col-md-6">
-                            <FormField label={i18n('SUPPORT_CENTER_URL')} fieldProps={{size: 'large'}} name="url"/>
-                            <FormField label={i18n('SUPPORT_CENTER_LAYOUT')} fieldProps={{size: 'large', items: [{content: i18n('BOXED')}, {content: i18n('FULL_WIDTH')}]}} field="select" name="layout"/>
+                            <FormField label={i18n('SUPPORT_CENTER_URL')} fieldProps={{size: 'large'}} name="url" validation="URL" required/>
+                            <FormField label={i18n('SUPPORT_CENTER_LAYOUT')} fieldProps={{size: 'large', items: [{content: i18n('BOXED')}, {content: i18n('FULL_WIDTH')}]}} field="select" name="layout" />
                         </div>
                         <div className="col-md-6">
-                            <FormField label={i18n('SUPPORT_CENTER_TITLE')} fieldProps={{size: 'large'}} name="title"/>
+                            <FormField label={i18n('SUPPORT_CENTER_TITLE')} fieldProps={{size: 'large'}} name="title" validation="TITLE" required/>
                             <FormField label={i18n('DEFAULT_TIMEZONE')} fieldProps={{size: 'large'}} name="time-zone"/>
                         </div>
                     </div>
@@ -85,16 +88,20 @@ class AdminPanelSystemPreferences extends React.Component {
                         <div className="col-md-6">
                             <div className="row admin-panel-system-preferences__languages">
                                 <div className="col-md-6 admin-panel-system-preferences__languages-allowed">
-                                    <div>{i18n('ALLOWED_LANGUAGES')}</div>
-                                    <FormField name="allowedLanguages" field="checkbox-group" fieldProps={{items: this.getLanguageList()}} />
+                                    <div>{i18n('ALLOWED_LANGUAGES')} <InfoTooltip text={i18n('ALLOWED_LANGUAGES_INFO')} /></div>
+                                    <FormField name="allowedLanguages" field="checkbox-group" fieldProps={{items: this.getLanguageList()}} validation="LIST" required/>
                                 </div>
                                 <div className="col-md-6 admin-panel-system-preferences__languages-supported">
-                                    <div>{i18n('SUPPORTED_LANGUAGES')}</div>
-                                    <FormField name="supportedLanguages" field="checkbox-group" fieldProps={{items: this.getLanguageList()}} />
+                                    <div>{i18n('SUPPORTED_LANGUAGES')} <InfoTooltip text={i18n('SUPPORTED_LANGUAGES_INFO')} /></div>
+                                    <FormField name="supportedLanguages" field="checkbox-group" fieldProps={{items: this.getLanguageList()}} validation="LIST" required/>
                                 </div>
                             </div>
                         </div>
                         <div className="col-md-6">
+                            <FormField className="admin-panel-system-preferences__default-language-field" name="language" label={i18n('DEFAULT_LANGUAGE')} decorator={LanguageSelector} fieldProps={{
+                                type: 'custom',
+                                customList: (this.state.values.supportedLanguages && this.state.values.supportedLanguages.length) ? this.state.values.supportedLanguages.map(index => languageKeys[index]) : undefined
+                            }} />
                             <FormField label={i18n('RECAPTCHA_PUBLIC_KEY')} fieldProps={{size: 'large'}} name="reCaptchaKey"/>
                             <FormField label={i18n('RECAPTCHA_PRIVATE_KEY')} fieldProps={{size: 'large'}} name="reCaptchaPrivate"/>
                             <div className="admin-panel-system-preferences__file-attachments">
@@ -105,7 +112,6 @@ class AdminPanelSystemPreferences extends React.Component {
                                 <span>{i18n('MAX_SIZE_KB')}</span>
                                 <FormField className="admin-panel-system-preferences__max-size-field" fieldProps={{size: 'small'}} name="max-size"/>
                             </div>
-                            <FormField className="admin-panel-system-preferences__default-language-field" name="language" label={i18n('DEFAULT_LANGUAGE')} decorator={LanguageSelector} />
                         </div>
                     </div>
                     <div className="row">
@@ -138,8 +144,17 @@ class AdminPanelSystemPreferences extends React.Component {
         }
     }
 
+    onFormChange(form) {
+        let values = _.clone(form);
+
+        _.extend(values, {
+            supportedLanguages: _.filter(values.supportedLanguages, (language) => _.includes(values.allowedLanguages, language))
+        });
+
+        this.setState({values, message: null});
+    }
+
     onSubmit(form) {
-        let fullList = Object.keys(languageList);
         this.setState({loading: true});
 
         API.call({
@@ -160,8 +175,8 @@ class AdminPanelSystemPreferences extends React.Component {
                 'maintenance-mode': form['maintenance-mode'],
                 'allow-attachments': form['allow-attachments'],
                 'max-size': form['max-size'],
-                'allowedLanguages': JSON.stringify(form.allowedLanguages.map(index => fullList[index])),
-                'supportedLanguages': JSON.stringify(form.supportedLanguages.map(index => fullList[index]))
+                'allowedLanguages': JSON.stringify(form.allowedLanguages.map(index => languageKeys[index])),
+                'supportedLanguages': JSON.stringify(form.supportedLanguages.map(index => languageKeys[index]))
             }
         }).then(this.onSubmitSuccess.bind(this)).catch(() => this.setState({loading: false, message: 'fail'}));
     }
@@ -188,8 +203,6 @@ class AdminPanelSystemPreferences extends React.Component {
     }
 
     onRecoverSettingsSuccess(result) {
-        let fullList = Object.keys(languageList);
-
         this.setState({
             loading: false,
             values: {
@@ -208,13 +221,13 @@ class AdminPanelSystemPreferences extends React.Component {
                 'maintenance-mode': result.data['maintenance-mode'],
                 'allow-attachments': result.data['allow-attachments'],
                 'max-size': result.data['max-size'],
-                'allowedLanguages': result.data.allowedLanguages.map(lang => (_.indexOf(fullList, lang))),
-                'supportedLanguages': result.data.supportedLanguages.map(lang => (_.indexOf(fullList, lang)))
+                'allowedLanguages': result.data.allowedLanguages.map(lang => (_.indexOf(languageKeys, lang))),
+                'supportedLanguages': result.data.supportedLanguages.map(lang => (_.indexOf(languageKeys, lang)))
             }
         });
     }
 
-    onRecoverSettingsFail(result) {
+    onRecoverSettingsFail() {
         this.setState({
             message: 'error'
         });
diff --git a/client/src/app/admin/panel/staff/staff-editor.js b/client/src/app/admin/panel/staff/staff-editor.js
index e5513e41..fdca49f0 100644
--- a/client/src/app/admin/panel/staff/staff-editor.js
+++ b/client/src/app/admin/panel/staff/staff-editor.js
@@ -137,7 +137,7 @@ class StaffEditor extends React.Component {
             <div>
                 <span className="separator staff-editor__separator"/>
                 <Form className="staff-editor__update-level" values={{level: this.state.level}} onChange={form => this.setState({level: form.level})} onSubmit={this.onSubmit.bind(this, 'LEVEL')}>
-                    <FormField name="level" label={i18n('LEVEL')} field="select" fieldProps={{
+                    <FormField name="level" label={i18n('LEVEL')} field="select" infoMessage={this.getStaffLevelInfo()} fieldProps={{
                                     items: [{content: i18n('LEVEL_1')}, {content: i18n('LEVEL_2')}, {content: i18n('LEVEL_3')}],
                                     size: 'large'
                                 }} />
@@ -219,6 +219,25 @@ class StaffEditor extends React.Component {
         return SessionStore.getDepartments().map(department => department.name);
     }
 
+    getStaffLevelInfo() {
+        return (
+            <div className="staff-editor__level-info">
+                <div className="staff-editor__level-info-box">
+                    <span className="staff-editor__level-info-title">{i18n('LEVEL')} 1 </span>
+                    <span className="staff-editor__level-info-description">{i18n('LEVEL_1_DESCRIPTION')}</span>
+                </div>
+                <div className="staff-editor__level-info-box">
+                    <span className="staff-editor__level-info-title">{i18n('LEVEL')} 2 </span>
+                    <span className="staff-editor__level-info-description">{i18n('LEVEL_2_DESCRIPTION')}</span>
+                </div>
+                <div className="staff-editor__level-info-box">
+                    <span className="staff-editor__level-info-title">{i18n('LEVEL')} 3 </span>
+                    <span className="staff-editor__level-info-description">{i18n('LEVEL_3_DESCRIPTION')}</span>
+                </div>
+            </div>
+        );
+    }
+
     onSubmit(eventType, form) {
         let departments;
 
diff --git a/client/src/app/admin/panel/staff/staff-editor.scss b/client/src/app/admin/panel/staff/staff-editor.scss
index aaf998d5..8e29ab3c 100644
--- a/client/src/app/admin/panel/staff/staff-editor.scss
+++ b/client/src/app/admin/panel/staff/staff-editor.scss
@@ -139,4 +139,21 @@
         float: left;
         margin-top: 11px;
     }
+
+    &__level-info {
+        width: 360px;
+        font-size: $font-size--sm;
+
+        &-box {
+            margin-top: 5px;
+        }
+
+        &-title {
+            color: $secondary-blue;
+        }
+
+        &-description {
+            color: $dark-grey;
+        }
+    }
 }
\ No newline at end of file
diff --git a/client/src/core-components/checkbox-group.js b/client/src/core-components/checkbox-group.js
index 76f6eb5c..bbe229a7 100644
--- a/client/src/core-components/checkbox-group.js
+++ b/client/src/core-components/checkbox-group.js
@@ -1,4 +1,5 @@
 import React from 'react';
+import classNames from 'classnames';
 import _ from 'lodash';
 
 import Checkbox from 'core-components/checkbox';
@@ -6,6 +7,7 @@ import Checkbox from 'core-components/checkbox';
 class CheckboxGroup extends React.Component {
     static propTypes = {
         items: React.PropTypes.array.isRequired,
+        errored: React.PropTypes.bool,
         value: React.PropTypes.arrayOf(React.PropTypes.number),
         onChange: React.PropTypes.func
     };
@@ -16,7 +18,7 @@ class CheckboxGroup extends React.Component {
     
     render() {
         return (
-            <ul className="checkbox-group">
+            <ul className={this.getClass()}>
                 {this.props.items.map(this.renderItem.bind(this))}
             </ul>
         );
@@ -31,6 +33,17 @@ class CheckboxGroup extends React.Component {
             </li>
         );
     }
+
+    getClass() {
+        let classes = {
+            'checkbox-group': true,
+            'checkbox-group_error': this.props.errored
+        };
+
+        classes[this.props.className] = (this.props.className);
+
+        return classNames(classes);
+    }
     
     onCheckboxChange(index) {
         let value = _.clone(this.getValue());
diff --git a/client/src/core-components/checkbox-group.scss b/client/src/core-components/checkbox-group.scss
index 92612c5c..198476d0 100644
--- a/client/src/core-components/checkbox-group.scss
+++ b/client/src/core-components/checkbox-group.scss
@@ -8,4 +8,9 @@
     &__item {
         margin: 10px 0;
     }
+
+    &_error {
+        border: 1px solid $primary-red;
+        padding-left: 7px;
+    }
 }
\ No newline at end of file
diff --git a/client/src/core-components/form-field.js b/client/src/core-components/form-field.js
index 78cb9dad..cbb8f091 100644
--- a/client/src/core-components/form-field.js
+++ b/client/src/core-components/form-field.js
@@ -8,6 +8,7 @@ import DropDown from 'core-components/drop-down';
 import Checkbox from 'core-components/checkbox';
 import CheckboxGroup from 'core-components/checkbox-group';
 import TextEditor from 'core-components/text-editor';
+import InfoTooltip from 'core-components/info-tooltip';
 
 class FormField extends React.Component {
     static contextTypes = {
@@ -21,6 +22,7 @@ class FormField extends React.Component {
         onBlur: React.PropTypes.func,
         required: React.PropTypes.bool,
         error: React.PropTypes.string,
+        infoMessage: React.PropTypes.node,
         value: React.PropTypes.any,
         field: React.PropTypes.oneOf(['input', 'textarea', 'select', 'checkbox', 'checkbox-group']),
         fieldProps: React.PropTypes.object
@@ -51,7 +53,7 @@ class FormField extends React.Component {
     render() {
         const Wrapper = (_.includes(this.getDivTypes(), this.props.field)) ? 'div' : 'label';
         const fieldContent = [
-            <span className="form-field__label" key="label">{this.props.label}</span>,
+            this.renderLabel(),
             this.renderField(),
             this.renderError()
         ];
@@ -59,6 +61,7 @@ class FormField extends React.Component {
         if (this.props.field === 'checkbox') {
             fieldContent.swap(0, 1);
         }
+
         return (
             <Wrapper className={this.getClass()}>
                 {fieldContent}
@@ -66,6 +69,15 @@ class FormField extends React.Component {
         );
     }
 
+    renderLabel() {
+        return (
+            <span className="form-field__label" key="label">
+                {this.props.label}
+                {(this.props.infoMessage) ? <InfoTooltip text={this.props.infoMessage} className="form-field__info" /> : null}
+            </span>
+        )
+    }
+
     renderField() {
         let Field = {
             'input': Input,
diff --git a/client/src/core-components/form-field.scss b/client/src/core-components/form-field.scss
index e818fcaf..28a3d6df 100644
--- a/client/src/core-components/form-field.scss
+++ b/client/src/core-components/form-field.scss
@@ -12,6 +12,12 @@
         text-align: left;
     }
 
+    &__info {
+        position: relative;
+        top: -1px;
+        left: 5px;
+    }
+
     &_errored {
         .form-field__error {
             color: $primary-red;
diff --git a/client/src/core-components/info-tooltip.js b/client/src/core-components/info-tooltip.js
index 92c6ca24..47f2c1da 100644
--- a/client/src/core-components/info-tooltip.js
+++ b/client/src/core-components/info-tooltip.js
@@ -8,7 +8,7 @@ import Tooltip from 'core-components/tooltip';
 class InfoTooltip extends React.Component {
     static propTypes = {
         type: React.PropTypes.oneOf(['default', 'warning']),
-        text: React.PropTypes.string.isRequired
+        text: React.PropTypes.node.isRequired
     };
 
     static defaultProps = {
@@ -31,6 +31,7 @@ class InfoTooltip extends React.Component {
 
     renderText() {
         let message = (this.props.type === 'default') ? i18n('INFO') : i18n('WARNING');
+
         return (
             <div className="info-tooltip__text">
                 <div className="info-tooltip__text-title">
@@ -47,6 +48,8 @@ class InfoTooltip extends React.Component {
             'info-tooltip_warning': (this.props.type === 'warning')
         };
 
+        classes[this.props.className] = (this.props.className);
+
         return classNames(classes);
     }
 }
diff --git a/client/src/core-components/info-tooltip.scss b/client/src/core-components/info-tooltip.scss
index 63691bad..b73f08b1 100644
--- a/client/src/core-components/info-tooltip.scss
+++ b/client/src/core-components/info-tooltip.scss
@@ -1,7 +1,10 @@
 @import "../scss/vars";
 
 .info-tooltip {
+    display: inline-block;
+
     &__text {
+
         &-title {
             color: $secondary-blue;
             font-size: $font-size--md;
@@ -10,9 +13,11 @@
 
     &__icon {
         color: $secondary-blue;
+        font-size: $font-size--sm;
     }
 
     &_warning {
+
         .info-tooltip__icon {
             color: $primary-red;
         }
diff --git a/client/src/data/fixtures/system-fixtures.js b/client/src/data/fixtures/system-fixtures.js
index a9f5687c..b67d450f 100644
--- a/client/src/data/fixtures/system-fixtures.js
+++ b/client/src/data/fixtures/system-fixtures.js
@@ -10,7 +10,7 @@ module.exports = [
                         'language': 'en',
                         'reCaptchaKey': '6LfM5CYTAAAAAGLz6ctpf-hchX2_l0Ge-Bn-n8wS',
                         'reCaptchaPrivate': 'LALA',
-                        'url': 'hola@lala.com',
+                        'url': 'http://www.opensupports.com/support',
                         'title': 'Very Cool',
                         'layout': 'Boxed',
                         'time-zone': 3,
diff --git a/client/src/data/languages/en.js b/client/src/data/languages/en.js
index 3f193dd2..67a36e64 100644
--- a/client/src/data/languages/en.js
+++ b/client/src/data/languages/en.js
@@ -107,6 +107,9 @@ export default {
     'LEVEL_1': 'Level 1 (Tickets)',
     'LEVEL_2': 'Level 2 (Tickets + Articles)',
     'LEVEL_3': 'Level 3 (Tickets + Articles + Staff)',
+    'LEVEL_1_DESCRIPTION': 'can only respond tickets and manage users.',
+    'LEVEL_2_DESCRIPTION': 'can do every Level 1 does, can create or edit articles and it can create custom responses.',
+    'LEVEL_3_DESCRIPTION': 'can do every Level 2 does, can create or edit staff members and can manage the whole system.',
     'UPDATE_EMAIL': 'Update email',
     'UPDATE_PASSWORD': 'Update password',
     'UPDATE_LEVEL': 'Update level',
@@ -118,11 +121,12 @@ export default {
     'COMMENTS': 'Comments',
     'DELETE_STAFF_MEMBER': 'Delete staff member',
     'MAINTENANCE_MODE': 'Maintenance mode',
+    'MAINTENANCE_MODE_INFO': 'It will temporary disable the system for regular users.',
     'RECOVER_DEFAULT': 'Recover default',
     'SUPPORT_CENTER_URL': 'Support Center URL',
     'SUPPORT_CENTER_TITLE': 'Support Center Title',
     'SUPPORT_CENTER_LAYOUT': 'Support Center Layout',
-    'DEFAULT_TIMEZONE': 'Default Timezone',
+    'DEFAULT_TIMEZONE': 'Default Timezone (GMT)',
     'NOREPLY_EMAIL': 'Noreply Email',
     'SMTP_USER': 'SMTP User',
     'SMTP_SERVER': 'SMTP Server',
@@ -135,7 +139,9 @@ export default {
     'UPDATE_SETTINGS': 'Update settings',
     'DEFAULT_LANGUAGE': 'Default Language',
     'SUPPORTED_LANGUAGES': 'Supported Languages',
+    'SUPPORTED_LANGUAGES_INFO': 'Supported languages are the languages that tickets can be written in.',
     'ALLOWED_LANGUAGES': 'Allowed Languages',
+    'ALLOWED_LANGUAGES_INFO': 'Allowed languages are the languages that can be used by an user.',
     'SETTINGS_UPDATED': 'Settings have been updated',
     'ON': 'On',
     'OFF': 'Off',
@@ -202,6 +208,7 @@ export default {
     'DEPARTMENTS_DESCRIPTION': 'A department is a group where the tickets can go. They are used to categorize the tickets. You can assign them to other staff members.',
     'MAINTENANCE_MODE_DESCRIPTION': 'The support system is in maintenance mode, thus unavailable at the moment. We will come back as soon as possible.',
     'EMAIL_TEMPLATES_DESCRIPTION': 'Here you can edit the templates of the emails that will be sent to users. Remember that the double brackets curly braces indicate a variable value. For example, \'name\' represents the user\'s name.',
+    'SYSTEM_PREFERENCES_DESCRIPTION': 'Here you can edit the preferences of the system.',
 
     //ERRORS
     'EMAIL_OR_PASSWORD': 'Email or password invalid',
@@ -223,6 +230,8 @@ export default {
     'ERROR_RETRIEVING_BAN_LIST': 'An error occurred while trying to retrieve the list of banned emails.',
     'ERROR_BANNING_EMAIL': 'An error occurred while trying to ban the email.',
     'ERROR_RETRIEVING_ARTICLES': 'An error occurred while trying to retrieve articles.',
+    'ERROR_LIST': 'Select at least one',
+    'ERROR_URL': 'Invalid URL',
 
     //MESSAGES
     'SIGNUP_SUCCESS': 'You have registered successfully in our support system.',
diff --git a/client/src/lib-app/validations/list-validator.js b/client/src/lib-app/validations/list-validator.js
new file mode 100644
index 00000000..eedc1663
--- /dev/null
+++ b/client/src/lib-app/validations/list-validator.js
@@ -0,0 +1,10 @@
+import Validator from 'lib-app/validations/validator';
+
+class ListValidator extends Validator {
+
+    validate(value, form) {
+        if (!value.length) return this.getError('ERROR_LIST');
+    }
+}
+
+export default ListValidator;
\ No newline at end of file
diff --git a/client/src/lib-app/validations/validations-factory.js b/client/src/lib-app/validations/validations-factory.js
index 6749d3b5..28aab598 100644
--- a/client/src/lib-app/validations/validations-factory.js
+++ b/client/src/lib-app/validations/validations-factory.js
@@ -3,6 +3,7 @@ import AlphaNumericValidator from 'lib-app/validations/alphanumeric-validator';
 import EmailValidator from 'lib-app/validations/email-validator';
 import RepeatPasswordValidator from 'lib-app/validations/repeat-password-validator';
 import LengthValidator from 'lib-app/validations/length-validator';
+import ListValidator from 'lib-app/validations/list-validator';
 
 let validators = {
     'DEFAULT': new Validator(),
@@ -11,7 +12,9 @@ let validators = {
     'EMAIL': new EmailValidator(),
     'TEXT_AREA': new LengthValidator(10, 'ERROR_CONTENT_SHORT'),
     'PASSWORD': new LengthValidator(6, 'ERROR_PASSWORD'),
-    'REPEAT_PASSWORD': new RepeatPasswordValidator()
+    'REPEAT_PASSWORD': new RepeatPasswordValidator(),
+    'URL': new LengthValidator(5, 'ERROR_URL'),
+    'LIST': new ListValidator()
 };
 
 class ValidatorFactory {