By now, you have seen the posts to your question on the General Forum. If Bank A and Bank B merge into Bank A's charter, with or without a name change, customers of Bank A don't need to receive a RESPA Servicer Change notice. You may elect to notify them of the name change so they can change how they make out their payment checks to you.
Bank B and Bank A will cooperate to issue a Servicer Change Notice to Bank B customers, I believe.
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8