diff --git a/swad_changelog.h b/swad_changelog.h
index 32fa50441..c01c39609 100644
--- a/swad_changelog.h
+++ b/swad_changelog.h
@@ -128,14 +128,15 @@
 /****************************** Public constants *****************************/
 /*****************************************************************************/
 
-#define Log_PLATFORM_VERSION	"SWAD 15.225.1 (2016-06-14)"
+#define Log_PLATFORM_VERSION	"SWAD 15.225.2 (2016-06-15)"
 #define CSS_FILE		"swad15.224.3.css"
 #define JS_FILE			"swad15.216.js"
 
 // Number of lines (includes comments but not blank lines) has been got with the following command:
 // nl swad*.c swad*.h css/swad*.css py/swad*.py js/swad*.js soap/swad*.h sql/swad*.sql | tail -1
 /*
-        Version 15.225.1: Jun 14, 2016	New option in user administration to report a user as possible duplicated. Not finished. (202468 lines)
+        Version 15.225.2: Jun 15, 2016	New option in user administration to report a user as possible duplicate. Not finished. (? lines)
+        Version 15.225.1: Jun 14, 2016	New option in user administration to report a user as possible duplicate. Not finished. (202468 lines)
         Version 15.225:   Jun 14, 2016	Removing a user's photo now requires confirmation. (202425 lines)
 					5 changes necessary in database:
 INSERT INTO actions (ActCod,Language,Obsolete,Txt) VALUES ('1574','es','N','Preguntar si eliminar foto otro usr.');
diff --git a/swad_enrollment.c b/swad_enrollment.c
index 849ea50de..0236062b8 100644
--- a/swad_enrollment.c
+++ b/swad_enrollment.c
@@ -3749,7 +3749,7 @@ void Enr_ModifyUsr (void)
 		  break;
 	       case Enr_REPORT_USR_AS_POSSIBLE_DUPLICATE:
 		  if (!ItsMe && Gbl.Usrs.Me.LoggedRole >= Rol_TEACHER)
-		     Lay_ShowAlert (Lay_INFO,"Option under development.");	// TODO: Program this!
+		     Usr_ReportUsrAsPossibleDuplicate ();
 		  else
 		     Error = true;
 		  break;
diff --git a/swad_user.c b/swad_user.c
index 0f05ce5d1..fc744ed7e 100644
--- a/swad_user.c
+++ b/swad_user.c
@@ -2705,6 +2705,7 @@ static void Usr_InsertMyLastData (void)
             (long) (time_t) 0);	// The user never accessed to notifications
    DB_QueryINSERT (Query,"can not insert last user's data");
   }
+
 /*****************************************************************************/
 /************* Write a row of a table with the data of a guest ***************/
 /*****************************************************************************/
@@ -7841,3 +7842,34 @@ void Usr_RemoveUsrFromUsrBanned (long UsrCod)
 	    UsrCod);
    DB_QueryDELETE (Query,"can not remove user from users banned");
   }
+
+/*****************************************************************************/
+/******************** Report a user as possible duplicate ********************/
+/*****************************************************************************/
+
+void Usr_ReportUsrAsPossibleDuplicate (void)
+  {
+   extern const char *Txt_User_not_found_or_you_do_not_have_permission_;
+   char Query[256];
+   bool ItsMe;
+
+   /***** Get user to be reported as possible duplicate *****/
+   if (Usr_GetParamOtherUsrCodEncryptedAndGetUsrData ())
+     {
+      /* Check if it's allowed to me to report users as possible duplicatedr */
+      ItsMe = (Gbl.Usrs.Me.UsrDat.UsrCod == Gbl.Usrs.Other.UsrDat.UsrCod);
+      if (!ItsMe && Gbl.Usrs.Me.LoggedRole >= Rol_TEACHER)
+	{
+         sprintf (Query,"REPLACE INTO usr_dup (UsrCod,UsrWhoReported,TimeReport)"
+                        " VALUES ('%ld','%ld',NOW())",
+                  Gbl.Usrs.Other.UsrDat.UsrCod,
+                  Gbl.Usrs.Me.UsrDat.UsrCod);
+         Lay_ShowAlert (Lay_INFO,Query);	// TODO: Remove this line, written only for debug purposes
+         // DB_QueryINSERT (Query,"can not report duplicate");
+	}
+      else
+         Lay_ShowAlert (Lay_WARNING,Txt_User_not_found_or_you_do_not_have_permission_);
+     }
+   else
+      Lay_ShowAlert (Lay_WARNING,Txt_User_not_found_or_you_do_not_have_permission_);
+  }
diff --git a/swad_user.h b/swad_user.h
index fc4212967..be6b56779 100644
--- a/swad_user.h
+++ b/swad_user.h
@@ -350,4 +350,6 @@ void Usr_GetAndShowNumUsrsInPlatform (Rol_Role_t Role);
 bool Usr_CheckIfUsrBanned (long UsrCod);
 void Usr_RemoveUsrFromUsrBanned (long UsrCod);
 
+void Usr_ReportUsrAsPossibleDuplicate (void);
+
 #endif