Mortgage Note Glossary — Terms & Definitions
Mortgage note investing has its own language. Whether you’re thinking about selling a note, exploring a partial purchase, or just trying to understand what your note buyer is talking about — this glossary gives you plain-English definitions for every term you’ll encounter.
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A separate sheet attached to a promissory note used to record endorsements when there is no room remaining on the original document. In note transactions, an allonge is used to endorse (transfer) the note to a new holder — either as part of a full sale or a hypothecation arrangement.
The process of paying off a loan through scheduled, regular payments over time. Each payment covers both interest and a portion of the principal balance. In the early years of a loan, most of each payment goes toward interest. In later years, more goes toward principal. A fully amortizing note reaches a zero balance at the end of the term.
The legal transfer of rights in a mortgage note and the accompanying security instrument (mortgage or deed of trust) from the seller to the buyer. A full assignment transfers all ownership rights permanently. A collateral assignment (used in hypothecation) transfers only a security interest — not full ownership.
A large lump-sum payment due at the end of a specified loan term that pays off the remaining balance in full. Seller-financed deals often use a balloon structure — payments amortize over 30 years to keep monthly amounts affordable, but the full remaining balance comes due at year 5 or 7. This gives buyers manageable monthly payments while giving sellers a defined exit date and encouraging buyers to eventually refinance into conventional financing.
The individual or entity that signed the promissory note and is obligated to make monthly payments. Also referred to as the “payer” (the one making payments) or “maker” (the one who created the note obligation). When a note is sold, the borrower’s loan terms remain completely unchanged — the only difference is where they send their payment.
A transfer of rights in an asset used as security for a loan, without transferring full ownership. In note hypothecation, the lender holds a collateral assignment of the mortgage note — meaning they have a lien against it — but the note holder retains ownership and continues receiving payments. If the note holder defaults on the hypothecation loan, the lender can enforce the collateral assignment and take full control of the note.
Failure by a borrower to meet the terms of their loan agreement — most commonly by missing one or more payments. A default gives the note holder the right to pursue remedies. The note holder may attempt to work out a loan modification, accept a deed-in-lieu, pursue a short sale, or initiate foreclosure proceedings depending on the situation.
A legal document used in many states in place of a traditional mortgage to secure a promissory note against real property. Involves three parties: the borrower (trustor) who owns the property, a neutral third party (trustee) who holds legal title, and the lender (beneficiary) whose loan is secured. Deeds of trust are common in non-judicial foreclosure states because they allow the trustee to sell the property without court action if the borrower defaults.
The difference between a note’s face value (unpaid principal balance) and the actual price paid by a note buyer. Notes rarely sell at par (100 cents on the dollar) because buyers require a yield above the note’s stated interest rate to compensate for risk, illiquidity, and the time value of money. The discount reflects the market’s pricing of time, collateral quality, and payment risk.
The difference between a property’s current market value and the outstanding loan balance. Higher equity means a lower loan-to-value ratio (LTV), which provides more collateral protection for the note buyer. If a borrower with significant equity defaults, the sale of the property is more likely to cover the outstanding loan balance — reducing the buyer’s risk of loss.
The legal process by which a lender takes possession of and sells a property when a borrower defaults on their loan. Foreclosure laws vary significantly by state. Judicial foreclosure states require a court process — slower and more expensive (12–36 months in some states). Non-judicial foreclosure states (like many Western states) allow a trustee sale without court involvement — typically faster (3–12 months). State foreclosure timelines directly affect note pricing — buyers discount more steeply for long-timeline states.
The stated value of a note — typically equal to the original loan amount or the current unpaid principal balance (UPB). Notes rarely sell at face value because note buyers require a yield that often exceeds the note’s stated interest rate. “Selling at par” means selling at 100% of face value — uncommon, and typically only seen on high-quality notes in favorable market conditions.
The pledging of an asset as collateral for a loan without transferring ownership of that asset. In note investing, a note holder pledges their performing mortgage note as security for a new loan — receiving a lump sum while retaining full ownership and continuing to collect the borrower’s payments. The hypothecation lender holds a collateral assignment (lien) against the note — not outright ownership. If the note holder fails to repay the hypothecation loan, the lender can enforce their rights and take control of the pledged note.
A party who acquires a negotiable instrument (such as a promissory note) for value, in good faith, and without notice of any defect or claim against it. A holder in due course has the right to enforce the note free from most claims or defenses the borrower might raise against the original lender. Note buyers who purchase notes through proper assignment generally qualify as holders in due course.
A state that requires lenders to go through the court system to foreclose on a property when a borrower defaults. Judicial foreclosure is slower and more expensive than non-judicial foreclosure — timelines can range from 12 months to 3+ years in some states. Note buyers price this risk into their offers — notes secured by properties in judicial foreclosure states typically receive slightly lower offers than comparable notes in non-judicial states.
A change to the original terms of a mortgage note — such as reducing the interest rate, extending the term, or forgiving a portion of the balance — made to help a borrower in default resume making payments. Loan modification is one of the primary resolution strategies for non-performing notes. A successful modification turns a non-performing note back into a performing one.
The ratio of the outstanding loan balance to the current market value of the property, expressed as a percentage. LTV is one of the most critical factors in note valuation — lower LTV means more equity protecting the note buyer if the borrower defaults. Note buyers generally prefer LTVs below 70–75%. Every 10-point increase in LTV above 70% typically reduces the offer price by 3–7%.
A seller-financing arrangement where the seller retains the legal title to the property until the buyer completes all payments. The buyer gains equitable title and the right to use the property, but the seller keeps legal title as security. Common in the Midwest. Also called a “contract for deed” or “installment sale contract.” Land contracts are purchasable by note buyers, though documentation requirements may vary from state to state.
A legal security instrument that pledges real property as collateral for a loan. The mortgage gives the lender the right to foreclose on the property if the borrower defaults. Unlike a deed of trust, a mortgage involves only two parties — the borrower (mortgagor) and the lender (mortgagee). Some states use mortgages; others use deeds of trust. Both serve the same purpose — securing the promissory note against real property.
A legal promissory document in which a borrower promises to repay a specific loan amount under defined terms — including the interest rate, payment schedule, and consequences of default. It is the primary evidence of a debt obligation secured by real property. The mortgage note is the “promise to pay”; the mortgage or deed of trust is the “or else” — the security instrument that gives the lender recourse against the property if the borrower stops paying.
An investor or company that purchases mortgage notes from note holders in exchange for a lump sum of cash. Note buyers earn their return through the yield generated by the spread between the discounted purchase price and the full stream of payments they collect over the life of the note. Cassidy Investment Group is a note buyer specializing in seller-financed notes, partial purchases, and hypothecation structures.
A mortgage note where the borrower has stopped making payments, typically 90 or more days past due. Non-performing notes carry significantly higher risk for note buyers and trade at steeper discounts than performing notes — typically 30–60% of unpaid principal balance — because the buyer must factor in resolution costs such as loan modification, short sale, deed-in-lieu, or foreclosure. Despite the risk, experienced investors purchase non-performing notes specifically to resolve them and earn returns through the resolution process.
The sale of an entire mortgage note to a note buyer in exchange for a lump sum of cash. Ownership transfers permanently through a full assignment of both the promissory note and the security instrument (mortgage or deed of trust). The seller receives the agreed purchase price and exits the note entirely — no future payments, no ongoing obligations. Compare to a partial note purchase, where only a defined number of payments are sold and the note eventually reverts.
Another term for seller financing — a transaction in which the property owner (seller) acts as the lender rather than requiring the buyer to obtain bank financing. See Seller Financing for the full definition.
A transaction in which a note buyer purchases a defined number of future payments — not the entire note. The note holder receives a lump sum of cash now. Once the buyer has collected the agreed-upon number of payments, the note reverts back to the original holder and they resume collecting the remaining payments. Partials let note holders access cash without permanently giving up their income stream.
A mortgage note where the borrower is current on payments — typically fewer than 30 days past due. Performing notes are the most desirable category for note buyers, generally selling for 70–92% of the unpaid principal balance depending on payment history, LTV, interest rate, and other factors. The longer and more consistently a note has been performing, the higher the offer price.
A legal written document in which one party (the maker/borrower) unconditionally promises to pay a specific sum of money to another party (the payee/lender) under defined terms — including interest rate, payment schedule, and default provisions. The promissory note is the debt obligation itself. The mortgage or deed of trust is the separate security instrument that ties the debt to a specific piece of real property.
A contract between a note seller and note buyer that outlines the terms of a note sale — including the purchase price, note details, representations and warranties, closing conditions, and timeline. Also called a Mortgage Purchase Agreement (MPA). Required for a full note sale. Not used in hypothecation transactions (which use a loan agreement instead).
The return of a note to its original holder after the partial purchase period ends. In a partial note purchase, the buyer collects a defined number of payments — then the note “reverts” back to the seller, who resumes collecting all remaining payments. Reversion is a key feature that makes partial purchases attractive to note holders who want to preserve long-term income while accessing immediate cash.
The length of time a mortgage note has been in existence and receiving on-time payments from the borrower. A “well-seasoned” note has 12–24+ months of consistent payment history, which demonstrates the borrower’s reliability and significantly increases the note’s value. Waiting to sell a note until it has more seasoning can add 5–15% to the purchase price — making it one of the highest-return decisions available to note holders who can afford to wait.
A real estate transaction structure in which the property seller acts as the lender — allowing the buyer to make monthly principal and interest payments directly rather than obtaining a bank mortgage. The agreement is formalized with a promissory note and a recorded mortgage or deed of trust. The seller-financed note created is a financial asset the seller can hold, sell, partially sell, or hypothecate. The U.S. seller financing market generated $29.5 billion in note volume in 2025 across 87,212 transactions.
A professional company that handles the ongoing administration of a mortgage loan on behalf of the note holder — collecting monthly payments, sending statements, managing tax and insurance escrow accounts, issuing year-end 1098 interest statements, and handling delinquency follow-up in compliance with federal consumer protection laws. Using a professional loan servicer is strongly recommended for all seller-financed notes, as it creates the documented payment history that note buyers require and ensures regulatory compliance.
A mortgage note where the borrower is making payments but not fully complying with the original loan terms — such as consistently paying late, making partial payments, or having a recent period of non-payment followed by resumed payments. Sub-performing notes fall between performing and non-performing in terms of risk and value. They typically sell at a moderate discount that reflects the borrower’s payment inconsistency.
A written notification required by federal law (RESPA) sent to the borrower when the servicing of their mortgage loan is transferred to a new entity. The notice informs the borrower of the effective transfer date and where to send future payments. The borrower’s loan terms — interest rate, payment amount, remaining term — are not changed. The transfer of servicing notice is standard in any note sale or partial purchase transaction.
Legal ownership of a property. “Clear title” means the property has no outstanding liens, claims, or encumbrances that could challenge the owner’s right to it. Note buyers conduct a title search before closing to verify the property’s title is clean. Title insurance protects the note buyer against any title defects discovered after closing. Unpaid property taxes, mechanic’s liens, or recording errors can create “clouds on title” that complicate or delay a note sale.
The remaining amount owed on a mortgage loan at any given point in time, not including accrued interest. UPB is the baseline figure from which note pricing is calculated. When a note buyer quotes a price as a percentage of UPB — such as “85 cents on the dollar” — they mean 85% of the current unpaid principal balance, not the original loan amount. As the borrower makes payments over time, the UPB decreases.
The process of evaluating a loan application or note purchase by analyzing the borrower’s creditworthiness, income, employment, the property’s value, and the note’s documentation to assess risk. When a note buyer underwrites a note purchase, they review payment history, LTV, interest rate, property value, and borrower information before making an offer. In seller financing, underwriting your buyer before creating a note is essential — it directly impacts your note’s future resale value.
The effective rate of return earned by a note buyer on their investment, taking into account the purchase price (discounted below UPB) and the full payment stream they will collect. When a note is purchased at a discount, the buyer’s actual yield is higher than the note’s stated interest rate — the difference being the return on the discount. Yield is the primary lens through which note buyers evaluate every purchase decision.
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This glossary is for educational purposes only and does not constitute financial, legal, or tax advice. Definitions are simplified for general understanding. Consult a qualified attorney, financial advisor, or tax professional before making decisions regarding mortgage note transactions. © 2026 Cassidy Investment Group, LLC.