PD – I don’t know what they mean by account number either.
I was wrong about Ultimate Bet. Never received an email but is is on their web site:
Due to new banking restrictions, UB will not be issuing affiliate payments via check. If you have selected check as a payment method, then please use your player account or ePassporte account as a means of receiving your monthly affiliate payment instead.
If you currently have check as your preferred payment method you will automatically receive your January payment deposited directly into your UB player account. If you do not have a player account at UB you will be required to set one up immediately in order get paid.