The ability for a MOD or employee to add a refer a friend to an account where it existed before but for account fixing situations, a new account was needed.
This may not happen too often but in my case, I set up my account first with a temporary number. After about a week everything seemed to be working so I ported my wife and completed refer a friend (i.e. myself). Everything was working well until I attempted to port my old Rogers number & after several errors, I suspect auto-fill was kind enough to enter the wrong porting number. To cut to the chase, in order to resolve the situation, a fine PM MOD was able to save that number, port the one I wanted but it meant creating a new account for myself which as it turned out didn`t have the refer a friend (as I didn`t think if it & probably wouldn`t have worked as she was now already a customer). A while later I realized I was no longer getting the refer a friend rewards but apparently it is not technically possible to add this later - even by employee or mods.