For purposes of enforcing the due-on-sale (or due-on-transfer) provision, if any, in the security instrument, the servicer must consider all of the following situations to be a transfer of ownership:
the purchase of a property “subject to” the mortgage loan,
the assumption of the mortgage loan debt by the property purchaser,
any exchange of possession of property under a land sales contract or any other land trust device, and
in cases in which an inter vivos revocable trust is the borrower, any transfer of a beneficial interest in the trust.
See below for related Q&A's:
For more information please see: D1-4.1-01, Determining Whether a Transfer of Ownership Is Permitted