Deed of trust transfers operate similarly to mortgage transfers, though neither one is especially common.
Whether buying a house with a deed of trust or a mortgage, the transferee will most likely need to enter into a new arrangement as part of the sale. However, in certain circumstances, like a property owner’s death, divorce or living will proceeding, both mortgage and deeds of trust can be transferred.
The appropriate authorities (usually a municipal government) will have to record the transfer, just like they would for a purchase agreement. And, as Frankel explains, "Based on the terms of the deed of trust, it may be assigned if all three parties agree in writing.";