The consent form does ask for the account number. It also asks for an address, though it doesn't specify if they're looking for the payment address or correspondence address.
Yes, account number, but it came up in a early thread that some banks / credit unions were requesting the loan number as well, and one example of the payoff info not being provided because this was not noted on the form.
So I called the loan department at Unify FCU (formerly Western), and they confirmed yes, VW would need a loan number when submitting their query. FWIW, I have a second auto loan with them, and have had others.
What they were looking for was for me to have typed "Loan 4" next to the account number.
Back on December 9th I resubmitted my consent form. I bet slightly altered VW's form in Acrobat so I could squeeze all this added info in (including two addresses, the loan number, my CU's name change, and a working telephone #).
Whether this helped? Dunno. Never saw it updated in my portal (I faxed it), but got my offer a month later.