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Promissory Note Guide

Promissory Note Templates: What a Lender Should Verify

Lending money to a friend or family member can be risky. A promissory note is your best protection, but only if it's complete and accurate. This guide explains what to verify before you hand over any cash.

Last updated 2026-08-10 · Promissory Note Forms Guides

Why a Written Promissory Note Matters

A promissory note is a written promise to repay a debt. It spells out the loan amount, interest rate, repayment schedule, and what happens if the borrower defaults. Without one, you may have no proof of the loan's terms, making it difficult to enforce repayment in court.

Even with a signed note, state laws vary on what makes it enforceable. For example, some states require notarization, while others do not. Always check your state's specific requirements to ensure your note holds up legally.

A well-drafted note also helps prevent misunderstandings. It clarifies whether the payment is a loan or a gift, which can have tax implications. For loans over a certain amount, the IRS may impute interest, so setting a reasonable rate is important.

  • A promissory note is legally binding if it includes all essential terms.
  • It protects both lender and borrower by documenting the agreement.
  • State laws vary on formalities like notarization and witness signatures.
  • A note can help avoid disputes about repayment terms later.

Verify the Borrower's Identity and Legal Capacity

Before lending, confirm the borrower's full legal name and current address. This seems obvious, but errors here can invalidate the note or make collection difficult. If the borrower is a business, get the exact legal entity name and the authorized signer's name and title.

You should also verify that the borrower is of legal age and mentally competent to sign a contract. If they are under 18 or lack capacity, the note may be voidable. This is rarely an issue with friends, but it's worth a quick check.

For larger loans, consider running a background check or reviewing their credit report. This can reveal past bankruptcies or judgments that signal a higher risk of default. You can request this information or use a service, but always get written consent first.

  • Use the borrower's full legal name, not a nickname.
  • Check the borrower's age and mental capacity to contract.
  • For businesses, confirm the entity type and signer's authority.
  • Consider a credit check for significant loan amounts.

Confirm the Loan Amount and Payment Terms

The note must clearly state the principal amount—the exact sum you are lending. Avoid rounding or vague terms like 'approximately.' Also, specify whether the principal will be paid in one lump sum or installments, and the due dates for each payment.

Interest rates are another critical term. If you charge interest, the rate must be stated, and it must not exceed your state's usury limit. If you lend without interest, say so explicitly to avoid the IRS imputing interest on loans over a certain amount.

Decide whether the loan is due on demand or on a specific date. A demand note allows you to call in the loan at any time, while a term note has a fixed maturity. Choose what works best for your situation and state it clearly in the note.

  • State the exact principal amount in numbers and words.
  • Define the repayment schedule: lump sum, installments, or on demand.
  • Set an interest rate that complies with state law, or explicitly state zero interest.
  • Specify the maturity date or the conditions for demanding repayment.

Include a Default and Remedies Clause

What happens if the borrower misses a payment? A strong promissory note includes a default clause that defines what constitutes default—for example, missing a payment by 10 days. It should also outline your remedies, such as accelerating the loan (making the entire balance due immediately) or charging late fees.

Late fees are allowed in many states, but they must be reasonable and stated in the note. Typically, they are a percentage of the missed payment or a flat fee. Check your state's limits to avoid penalties for excessive fees.

You may also want to include a provision for attorney's fees and collection costs if you have to hire a lawyer to collect. This can deter default and ensure you aren't out-of-pocket for enforcement. However, some states limit or prohibit such clauses, so verify your local rules.

  • Define default clearly, such as a missed payment or bankruptcy filing.
  • Specify remedies like acceleration, late fees, or repossession of collateral.
  • Include a clause for attorney's fees and collection costs, if allowed.
  • Consider requiring the borrower to pay all costs of collection, including court costs.

Check for Collateral and Co-Signers

If the loan is secured, the note should describe the collateral in detail. For example, if the loan is for a car, include the VIN and a description. If the collateral is real estate, you may need a separate mortgage or deed of trust, not just a promissory note.

A co-signer can add security to the loan. If you require one, make sure the co-signer signs the note and understands their obligation. The note should state that the co-signer is jointly and severally liable, meaning you can collect from either party.

Verify that any collateral is owned free and clear by the borrower. If there are existing liens, your claim may be secondary. You can check public records or request a title search to confirm.

  • Describe collateral with specific details to avoid ambiguity.
  • For real estate, use a separate security instrument like a deed of trust.
  • Require a co-signer if the borrower's credit is weak, and have them sign.
  • Verify the collateral has no prior liens to protect your priority.

Sign and Store the Note Properly

Both you and the borrower must sign the note. In many states, only the borrower's signature is required, but having both signatures is better evidence. Some states require witnesses or notarization to make the note self-authenticating in court. Check your state's rules.

Make copies for all parties. Keep the original in a safe place, like a fireproof safe or a bank deposit box. If the note is lost, you may have trouble proving its terms. Consider scanning it and storing a digital copy as well.

If you modify the loan terms later, do it in writing. Verbal changes may not be enforceable. Create a written amendment, signed by both parties, and attach it to the original note. This avoids confusion and preserves your rights.

  • Ensure all parties sign and date the note.
  • Notarize or add witnesses if your state requires it.
  • Store the original safely and keep digital copies.
  • Document any changes in a written amendment signed by both parties.

Sources & references

For further reading, see these general legal resources from the Cornell Legal Information Institute.

External links open in a new tab. These sources are provided for general information only and are not legal advice.

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Frequently asked questions

What is the difference between a promissory note and an IOU?

An IOU is a simple acknowledgment of a debt, while a promissory note includes the repayment terms, interest, and remedies. A promissory note is more formal and provides stronger legal protection for the lender.

Can I use a promissory note template from the internet?

Yes, but you must customize it to your specific loan and state law. A generic template may miss important clauses or use language that doesn't comply with your state's requirements. Review it carefully or consult a lawyer.

What if the borrower stops paying?

First, send a written notice of default. If they don't respond, you may need to pursue legal action, such as filing a lawsuit or using a collection agency. The promissory note is your evidence in court, so keep it safe.

Is it legal to charge interest on a personal loan?

Yes, but the rate must not exceed your state's usury limit. If you charge no interest, the IRS may still impute interest for loans over a certain amount. Check both state and federal rules to stay compliant.

State-specific promissory note guides

Every state has different rules. See the detailed guides for your state.