Is annual credit and income verification the law now for longstanding mortgages?

[Johann Jells]

The bank we borrowed from last a decade ago has in the last few years after they were acquired started sending us a packet of intrusive info requests, like wanting 1040's and other stuff. We've ignored them. We've paid them on time for 17 years, our credit ratings are in the 700's, why are they hassling us? My theory is they want it either to sell the info or sell the loans. Any insight? Is this new post crash law?