An Affidavit of Lost Note is a sworn statement given to prove that a promissory note (a written promise to pay a debt) has been lost or destroyed. The affidavit is used to replace the lost note and protect the lender's interest in the debt. There are two types of Affidavit of Lost Note: the Affidavit of Lost Instrument and the Affidavit of Lost Note. The Affidavit of Lost Instrument is used when the promissory note is unsecured, does not have a co-maker, and does not have collateral. The affidavit must be signed by the lender, and it must include information such as the name of the lender, date of the note, amount of the note, and name of the borrower. The Affidavit of Lost Note is used when the promissory note is secured by a co-maker or collateral. The affidavit must be signed by both the lender and the co-maker or collateral holder, and it must include information such as the name of the lender, date of the note, amount of the note, name of the borrower, name of the co-maker or collateral holder, and description of the collateral.