diff --git a/src/core/course/components/module-completion/module-completion.ts b/src/core/course/components/module-completion/module-completion.ts
index 1bd9e99a2..169363ca4 100644
--- a/src/core/course/components/module-completion/module-completion.ts
+++ b/src/core/course/components/module-completion/module-completion.ts
@@ -17,6 +17,7 @@ import { TranslateService } from '@ngx-translate/core';
 import { CoreSitesProvider } from '../../../../providers/sites';
 import { CoreDomUtilsProvider } from '../../../../providers/utils/dom';
 import { CoreTextUtilsProvider } from '../../../../providers/utils/text';
+import { CoreUserProvider } from '../../../user/providers/user';
 
 /**
  * Component to handle activity completion. It shows a checkbox with the current status, and allows manually changing
@@ -39,8 +40,8 @@ export class CoreCourseModuleCompletionComponent implements OnChanges {
     completionImage: string;
     completionDescription: string;
 
-    constructor(private textUtils: CoreTextUtilsProvider, private translate: TranslateService,
-            private domUtils: CoreDomUtilsProvider, private sitesProvider: CoreSitesProvider) {
+    constructor(private textUtils: CoreTextUtilsProvider, private domUtils: CoreDomUtilsProvider,
+            private translate: TranslateService, private sitesProvider: CoreSitesProvider, private userProvider: CoreUserProvider) {
         this.completionChanged = new EventEmitter();
     }
 
@@ -130,13 +131,13 @@ export class CoreCourseModuleCompletionComponent implements OnChanges {
                 if (this.completion.overrideby > 0) {
                     langKey += '-override';
 
-                    // @todo: Get user profile.
-                    // promise = $mmUser.getProfile(scope.completion.overrideby, scope.completion.courseId, true).then(function(profile) {
-                    //     return {
-                    //         overrideuser: profile.fullname,
-                    //         modname: modNameFormatted
-                    //     };
-                    // });
+                    promise = this.userProvider.getProfile(this.completion.overrideby, this.completion.courseId, true).then(
+                            (profile) => {
+                        return {
+                            overrideuser: profile.fullname,
+                            modname: modNameFormatted
+                        };
+                     });
                 } else {
                     promise = Promise.resolve(modNameFormatted);
                 }
diff --git a/src/core/user/providers/user.ts b/src/core/user/providers/user.ts
index b243db4c9..21c647b7f 100644
--- a/src/core/user/providers/user.ts
+++ b/src/core/user/providers/user.ts
@@ -79,6 +79,32 @@ export class CoreUserProvider {
         });
     }
 
+    /**
+     * Store user basic information in local DB to be retrieved if the WS call fails.
+     *
+     * @param  {number} userId  User ID.
+     * @param {string} [siteId] ID of the site the event belongs to. If not defined, use current site.
+     * @return {Promise<any>}   Promise resolve when the user is deleted.
+     */
+    deleteStoredUser(userId: number, siteId?: string): Promise<any> {
+        if (isNaN(userId)) {
+            return Promise.reject(null);
+        }
+
+        let promises = [];
+
+        siteId = siteId || this.sitesProvider.getCurrentSiteId();
+
+        // Invalidate WS calls.
+        promises.push(this.invalidateUserCache(userId, siteId));
+
+        promises.push(this.sitesProvider.getSite(siteId).then((site) => {
+            return site.getDb().deleteRecords(this.USERS_TABLE, { id: userId });
+        }));
+
+        return Promise.all(promises);
+    }
+
     /**
      * Get user profile. The type of profile retrieved depends on the params.
      *
diff --git a/src/core/user/user.module.ts b/src/core/user/user.module.ts
index 474d9171a..89f35804b 100644
--- a/src/core/user/user.module.ts
+++ b/src/core/user/user.module.ts
@@ -18,6 +18,8 @@ import { CoreUserProfileFieldDelegate } from './providers/user-profile-field-del
 import { CoreUserProvider } from './providers/user';
 import { CoreUserHelperProvider } from './providers/helper';
 import { CoreUserProfileMailHandler } from './providers/user-handler';
+import { CoreEventsProvider } from '../../providers/events';
+import { CoreSitesProvider } from '../../providers/sites';
 
 @NgModule({
     declarations: [
@@ -33,7 +35,27 @@ import { CoreUserProfileMailHandler } from './providers/user-handler';
     ]
 })
 export class CoreUserModule {
-    constructor(userDelegate: CoreUserDelegate, userProfileMailHandler: CoreUserProfileMailHandler) {
+    constructor(userDelegate: CoreUserDelegate, userProfileMailHandler: CoreUserProfileMailHandler,
+            eventsProvider: CoreEventsProvider, sitesProvider: CoreSitesProvider, userProvider: CoreUserProvider) {
         userDelegate.registerHandler(userProfileMailHandler);
+
+        eventsProvider.on(CoreEventsProvider.USER_DELETED, (data) => {
+            // Search for userid in params.
+            let params = data.params,
+                userId = 0;
+            if (params.userid) {
+                userId = params.userid;
+            } else if (params.userids) {
+                userId = params.userids[0];
+            } else if (params.field === 'id' && params.values && params.values.length) {
+                userId = params.values[0];
+            } else if (params.userlist && params.userlist.length) {
+                userId = params.userlist[0].userid;
+            }
+
+            if (userId > 0) {
+                userProvider.deleteStoredUser(userId, data.siteId);
+            }
+        }, sitesProvider.getCurrentSiteId());
     }
 }