Show the death certificate, and the property owner's parents, spouse and children will negotiate the amount of the property before going to the notary office for inheritance notarization. If there is a dispute, they will go to court for judgment.

Finally, apply to the bank that handles the mortgage for the lender to repay the loan in advance!

Let's see if the victim has insurance. Some insurance clauses can stipulate that the insurance company will repay the mortgage for the deceased.