Translation:Shulchan Aruch/Choshen Mishpat/239

Paragraph 1- If one comes and says he lost the document he had on such and such field that I acquired from so and so, we would agree to his request to write another document. Similarly, originally when the party is acquiring they can write two or three documents in this manner. We write on this document, “this document cannot be used to collect from encumbered or unencumbered property, we are only writing it to affirm the status of such and such field so that the seller cannot remove it from the buyer.” There are those who say we can only write the document with the original date and not from the later date because there is a concern that the buyer sold the field to the seller after purchasing it from him and the buyer will then produce this second document whose date is after the interim sale document and he would argue that he subsequently purchased it back from the seller.

Paragraph 2- Although postdated loan documents are valid, postdated sale documents are invalid unless they explicitly say they are postdated.