Section 15 Copy of notice; affidavit; recording; evidence
Section 15. The person selling, or the attorney duly authorized by a writing or the legal guardian or conservator of such person, shall, after the sale, cause a copy of the notice and his affidavit, fully and particularly stating his acts, or the acts of his principal or ward, to be recorded in the registry of deeds for the county or district where the land lies, with a note or reference thereto on the margin of the record of the mortgage deed, if it is recorded in the same registry. If the affidavit shows that the requirements of the power of sale and of the statute have in all respects been complied with, the affidavit or a certified copy of the record thereof, shall be admitted as evidence that the power of sale was duly executed.