How does buying a promissory note work?

The current holder sells the right to collect the remaining payments, usually at a discount to the outstanding balance. The transfer happens by endorsement or a written assignment, plus physical delivery of the original note. After closing, the borrower owes you, and the borrower should receive written notice to send payments to you.

Why are promissory notes sold at a discount?

Because the buyer takes on the risk and the wait. The discount compensates for the chance of default, the cost of collection, the time value of the remaining payments, and any documentation weaknesses. A seasoned note with years of on-time payments and recorded collateral might sell near face value; an unsecured note with a spotty ledger sells far below it. A large discount is the seller telling you what they think of the borrower.

What documents should I demand before buying a note?

The original signed note, the complete payment history, the security agreement and proof of any recorded lien (UCC-1 filing, vehicle title, or recorded mortgage), any guaranty, the borrower's contact information, and a signed estoppel certificate in which the borrower confirms the balance, the rate, and that they have no defenses or offsets against the note.

Why does the original note matter so much?

Because the note is the enforceable instrument, and courts and borrowers can demand the original when you sue or collect. A seller who cannot produce the original may have already sold it, pledged it, or lost it, each of which is your problem after closing. If the original is genuinely lost, the sale needs a lost-note affidavit and indemnity, and the price should reflect the added risk.

Does the borrower have to agree to the sale?

Generally no. Most notes are freely transferable without the borrower's consent, unless the note itself restricts assignment. The borrower keeps every term they signed, including their defenses. What they are owed is written notice of the new holder and where to pay, which protects them from paying the wrong party and protects you from missed payments.

Buying a Promissory Note: Due Diligence Before You Pay

Someone is offering to sell you a stream of payments at a discount: a seller-financed mortgage note, a business loan, a note from a private deal. The pitch is yield. The reality is that every note is discounted for a reason, and the entire craft of buying notes is figuring out which reason before your money moves. Here is the checklist.

What you are actually buying

Not paper. You are buying the borrower's willingness and ability to keep paying, for years, to a stranger. The seller's charm, the yield math, and the story about why they need liquidity are all secondary to one question: has this specific borrower paid reliably, and can they keep doing it? Every step below is a way of answering that question with documents instead of assurances. For the seller's side of this transaction, see selling or assigning a promissory note.

The document checklist

The original signed note. Not a scan. The original is the enforceable instrument, and you take physical delivery at closing.
The complete payment ledger, ideally verifiable against bank deposits, showing every payment and its date.
The security package, if secured: the security agreement plus proof the lien is actually recorded, whether that is a UCC-1 filing, a lien on a vehicle title, or a recorded mortgage or deed of trust.
Any guaranty, and confirmation it transfers with the note.
An estoppel certificate signed by the borrower confirming the current balance, the rate, and that they claim no defenses, offsets, or disputes.
The chain of ownership, if the note has been sold before: every prior endorsement or assignment, unbroken.

Why the original note is non-negotiable

Under the Uniform Commercial Code, enforcement rights follow the instrument, and a court or a borrower can demand the original when you try to collect. A seller who cannot produce it may have lost it, or may have already sold or pledged the same note to someone else, and either way that becomes your problem after closing. If the original is genuinely lost, the deal can still close with a lost-note affidavit and an indemnity, at a price that reflects the extra risk. See lost or destroyed promissory notes.

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Underwriting the borrower and the collateral

Seasoning. How many payments have been made, and how consistently? Twelve on-time payments tell you more than any credit score.
The borrower's capacity. For larger notes, ask for current income or business financials through the seller.
Collateral value and position. If secured, what is the asset worth today, and is your lien first or behind someone else? See perfecting collateral liens.
The note's own terms. Rate within the usury cap, clear schedule, late-fee and acceleration clauses that work. A defective note is a discounted note. See what a note must include.
Verify the balance independently. The estoppel certificate exists because seller ledgers are sometimes wrong, and sometimes optimistic.

Reading the discount

The discount is not a bargain meter, it is a risk gauge. Seasoned, secured, well-papered notes trade near their remaining balance. Unsecured notes, thin payment histories, missing originals, and borrowers nobody can reach trade at deep discounts because collection is genuinely uncertain. When a seller offers a steep discount on a supposedly great note, the discount is the honest signal; believe it over the story. Remember too that when you buy a note, you inherit the borrower's defenses against the original lender, which is exactly what the estoppel certificate is designed to surface before you pay.

Closing it properly

A written note purchase and assignment agreement, signed by both parties.
Endorsement of the note to you, plus physical delivery of the original.
Recorded assignment of any mortgage or amendment of the UCC filing, so the collateral follows the note.
Written notice to the borrower naming you as the new holder and giving payment instructions.
Your own ledger starting day one. See keeping a payment ledger.

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