Section 9. A facsimile of the signature of the recorder, imprinted by him or by such office assistant as he in writing may designate, on any paper which he is required by law to certify as a true copy, except a copy of a decree for transcription in a registry of deeds, and such facsimile imprinted by the recorder himself upon any writ, summons, order of notice or order of attachment, except executions, shall have the same validity as his written signature.