Might be as easy as having an ‘amnesty’ promotion and allow former club members to retain their original club member number, without having to pay years worth of back dues.

Local governments have done this allowing people to pay old parking tickets without requiring them to also pay the accumulated late fees.

What a promotion this would be for the Club to allow past members to rejoin the club at the regular yearly rate and allow them to get back their membership number, for a very limited amount of time..