We are looking to re-finance Grandmas house with her so we can get on the loan + title. It is in a trust, revocable I think, and she wants to put her son on as co-borrower. He is a co-executor of her trust. We wanted to know what tax and other financial liability issues will crop up later on if we do this. Is there a tax reassessment, stepped up value (not sure what that is) or anything that will alert the IRS or the bank.