Which document must be filed to indicate the loan has been satisfied and release the lien on a property?

To indicate that a loan has been satisfied and to effectively release the lien on a property, the correct document to file is the Release of Lien. This document serves as formal evidence that the loan has been paid off, thereby eliminating the lender's claim against the property. It is an essential legal instrument that signifies to the public and future buyers that the lien has been lifted, ensuring that the property is free of that particular debt.

The Deed of Trust is related to the securing of the loan but does not serve the purpose of releasing the lien. A Mortgage Assignment involves transferring the rights to collect on the mortgage to another party, but it does not release the original lien. An Affidavit of Satisfaction is not standard in the context of real estate transactions for lien releases, as it may relate more to asserting that a debt has been fulfilled in a more personal context rather than formally documenting the release of a lien.