The conditions for handling the loan require the lender to provide proof of personal marital status. The divorce agreement is just a kind of marriage certificate. This is a proof of your current marital status. The loan requires a marriage certificate, which is a factor of customer stability.
If you are married, you need the signature of both husband and wife to apply for a loan to mortgage the property. Divorce requires a divorce certificate and a divorce agreement to prove that the mortgaged property is personal property. If you are unmarried, you certainly don't need a divorce certificate.