The Mortgage Note Due Diligence Checklist

The discount you negotiate only matters if the note is what the seller says it is. Due diligenceis how you confirm that. Work this checklist before every purchase — it’s organized roughly in the order you should tackle it, from documents to collateral to legal status.

1. The collateral file (the document package)

The “collateral file” is the set of original documents that prove the debt and your right to collect it. Confirm you’ll receive:

• The promissory note — ideally the original, wet-ink, with any allonges (attached endorsements) showing the chain of transfers.
• The security instrument — the recorded mortgage, deed of trust, or land contract.
• The assignment chain — recorded assignments connecting the original lender to the current seller. Gaps here are a serious red flag.
• Title policy and the original closing documents (HUD-1 / Closing Disclosure, etc.).

2. Payment history & servicing record

Pull the pay historyfrom the current servicer — not just a verbal “it’s current.” Verify:

• Months of on-time payments and any delinquencies or modifications.
• The true unpaid principal balance, escrow balance, and any advances.
• For reperforming notes, enough seasoning to trust the turnaround.

3. The borrower

You’re buying their promise to pay. Where available, review the borrower’s credit profile at origination (FICO band), occupancy (owner-occupied, tenant, or vacant), and any bankruptcy or loss-mitigation activity that affects how — and how fast — you could enforce the note.

4. The collateral: property value

Independently confirm the property’s value with a BPO (broker price opinion), appraisal, or at minimum recent comparable sales. This sets your ITV and LTV — the equity cushion that protects you if the loan goes bad. Over-stated value is the most common way note buyers lose money.

5. Title & liens

• Order a current title search (an O&E report at minimum).
• Confirm your lien position— is anything senior to your note? Are there judgments, mechanic’s liens, or HOA liens?
• Make sure the assignment chain actually records you as the new holder.

6. Taxes & insurance

Check for delinquent property taxes (a tax lien can leapfrog your mortgage) and confirm hazard insurance is in force with the lender named as mortgagee. Unpaid taxes and lapsed insurance are quiet ways collateral value evaporates.

7. Legal & foreclosure status

• Is there an active foreclosure, bankruptcy, forbearance, or loss-mitigation process? Each changes your timeline and rights.
• Is the property in a judicial or non-judicial foreclosure state? This drives the cost and length of an NPL workout.
• Confirm the statute of limitationson enforcement hasn’t run.

8. Common red flags

• A broken or missing assignment chain.
• Property value that only “works” at the seller’s number.
• A junior lien behind a maxed-out senior with no equity cushion.
• Delinquent taxes, lapsed insurance, or an occupied property you can’t inspect.
• Pressure to skip diligence or “close today.”