Then they just ask the administrator of the account to reauthorise Fred to access, no need for a full on postal ID check again.
I just had similar issue with betfair it seems. I had a horrible process to follow when I had to verify my ID as I refused to send it without written agreement from them the data will be destroyed which they kept refusing, eventually they agreed and my account got "ID verified", then today I tried to login a couple of years later and its disabled for "lack of ID verification", I assume its not a one off thing and they expect people to take this security risk practice at intervals.
Skybet also disabled me after a period of time last year, and bet365 have done it as well, seems common practice in betting industry to routinely disable accounts that arent active, then of course if they want to be used again you have to jump through walls, although in the case of bet365 a phone call was enough, but in my opinion that shouldnt even be needed. Skybet wanted my photo ID again.