Which clause in a mortgage denotes that a sale of the property will trigger full loan repayment?

The due on sale clause is the correct answer because it specifically stipulates that if the property is sold, the lender has the right to require the full repayment of the remaining loan balance. This clause is designed to protect lenders by ensuring that new buyers cannot assume the existing mortgage unless certain conditions are met.

By including a due on sale clause, lenders can maintain control over who is responsible for the mortgage and the terms under which it can be transferred. This clause is particularly important in situations where property values fluctuate, as it ensures that the lender can require payment of the entire loan if the borrower sells the property.

An acceleration clause, while relevant to loan terms, triggers full repayment of the loan under specific conditions or defaults rather than due to a sale. The subordination clause typically relates to the order of claims in case of foreclosure, affecting the priority of debts but not directly linked to the sale of the property. An estoppel clause pertains to affirmations related to the terms of the loan or lease agreements but does not specify repayment terms related to a sale.