A plaintiff must allege that it is in possession of the underlying Note in order to establish that it has standing to prosecute the action. Note: See affidavit form in Pa.R.C.P. 240.Fill out the claim form and demand for a prompt hearing below. Deliver the form or mail it to the Sheriff's Office at the address noted. Creating a lost note affidavit is an essential process for protecting the legal rights of all involved in a promissory note transaction. Original Writ of Execution (Obtain from Allegheny County Sheriff's Office). â–¡ Affidavit of Rule 3129.1 (1). No deficiency upon judicial foreclosure of purchase money mortgage on owner- occupied dwelling with four or fewer units, or for failure to complete purchase by. Likewise, there can be no lost note affidavit in a MERS foreclosure. For complete classification of this Act to the Code, see Short Title note set out under section 471 of Title 40 and Tables.