Section 2. If an entry for breach of condition is made without a judgment, a memorandum of the entry shall be made on the mortgage deed and signed by the mortgagor or person claiming under him, or a certificate, under oath, of two competent witnesses to prove the entry shall be made. Such memorandum or certificate shall after the entry, except as provided in section seventy of chapter one hundred and eighty-five, be recorded in the registry of deeds for the county or district where the land lies, with a note of reference, if the mortgage is recorded in the same registry, from each record to the other. Unless such record is made, the entry shall not be effectual for the purposes mentioned in the preceding section.