No Reg Z disclosures are required and even the CARD Act confirms this. But it's always a good idea to communicate the payments, perhaps the rate, and when payments are due. It may also be worth verifying the date the protections ended, i.e. "here is when we show you were discharged and the protections ended based on the (consumer) / (mortgage) loan.
Because the bank was legally required to make these changes, you had no choice. But it doesn't say you don't have to anywhere, nor does it say you do.
My opinions are not necessarily my employers.
Rules and Regs minus Relationships equals Resentment and Rebellion. John Maxwell