The cascade is usually this:
1) The Underwriter sees the chain of addresses on the application.
2) They look at your 1040's or the 4506-T and see that property taxes are paid, along with mortgage interest.
3) They'll ask if payments on the property were made from a joint account.
It's up to the Underwriters discretion to approve or deny the loan at that point. The benefit of home ownership was shared, so the credit mismanagement and loss of the property is also to be shared. It's guilt by association. They might even do a search through all social media (TI qualifies here) and find that this strategy was put in place just to duck out of responsibility. Yes, that level of investigation is going to happen. If you were lending you own money, wouldn't you do the same thing? If not, I'd like to borrow a quick $500 large from you, STAT!
My .02c