Ch. 7 and Notice to File Claims

Our bank has a customer who filed Chapter 7 No Assets, and it has been recently discharged. We have a second mortgage on her home; she has never been late on her payments and a re-affirmation agreement was not signed. Last week we received a "Notice to File Claims" because she has assets. She continues to make her payments on this loan. Are we to file a claim? I am not sure how to handle this. We also cannot find that she exempted the bank from her bankrupcy.