This glossary covers the essential terms every seller carryback mortgage participant and private note investor needs to know. If you currently hold a privately originated mortgage note — or plan to acquire one — these definitions provide the foundation for sound decisions, proper documentation, and ongoing regulatory compliance.

Seller Carryback Mortgage

A seller carryback mortgage — also called seller financing — occurs when the property seller acts as the lender, extending credit directly to the buyer rather than requiring conventional bank financing. The buyer makes payments to the seller under the terms of an executed promissory note. For sellers who become private lenders, and for any note investor who later acquires the note, proper documentation and professional loan servicing are the difference between a protected asset and a costly administrative exposure.

Promissory Note

The promissory note is the legally binding written promise by a borrower to repay a principal amount under defined terms — specifying the interest rate, payment schedule, maturity date, and default provisions. In a seller carryback transaction, the promissory note is the core asset: it represents the debt itself. Every aspect of payment collection, accounting, and enforcement in private mortgage servicing flows directly from what the note says.

Deed of Trust / Mortgage

A deed of trust or mortgage is the legal instrument that secures a promissory note by placing a lien on real property. It gives the lender — whether the original seller or a subsequent note investor — the right to foreclose if the borrower defaults. The instrument used varies by state: some jurisdictions are mortgage states; others operate under deeds of trust. Confirming this lien is properly recorded and in first position is a non-negotiable step in note due diligence. Professional servicing monitors lien status and enforceability throughout the loan term.

Note Investor

A note investor is an individual or entity that purchases existing promissory notes — typically secured by real estate — from the original lender. The objective is to earn a return through collected interest payments or by acquiring notes at a discount to face value. Effective note investing demands disciplined due diligence at acquisition and a reliable servicing partner post-purchase to handle payment administration, regulatory compliance, and collections without requiring hands-on management from the investor.

Loan Servicing

Loan servicing is the administrative management of a mortgage note from boarding through payoff. Core functions include collecting and posting payments, managing escrow accounts for property taxes and insurance, generating borrower statements, handling inquiries, and initiating loss mitigation or foreclosure when required. For seller carryback mortgages and note investors, professional servicing ensures compliance with RESPA, TILA, and applicable state law — and protects both the lender’s collateral and the borrower’s rights. Many private lenders underestimate how quickly self-servicing creates exposure; see 10 real examples of why self-servicing a seller carry is the most expensive mistake.

Performing Note

A performing note is a promissory note on which the borrower is current — making every scheduled payment in full and on time under the original loan agreement. Performing notes are the preferred asset for private note investors because they deliver predictable income and carry a lower risk profile. Maintaining that performing status requires diligent payment processing, accurate accounting, and proactive borrower communication — all core functions of professional private mortgage servicing.

Non-Performing Note (NPN)

A non-performing note (NPN) is a promissory note on which the borrower has missed payments, typically defined as 90 or more days past due. NPNs are frequently sold at a discount to investors prepared to work through the default. Resolution paths include loan modification, repayment plans, forbearance agreements, deed in lieu of foreclosure, or formal foreclosure. Early servicing intervention is the best defense against a note sliding into non-performing status; see 7 warning signs a note is going non-performing for specific signals to monitor.

Discounted Note

A discounted note is a promissory note purchased for less than its current unpaid principal balance. The gap between purchase price and outstanding balance represents the discount — and that discount increases the investor’s effective yield above the note’s stated interest rate. Factors driving discount depth include payment history, remaining term, note interest rate relative to market rates, and the collateral property’s current value. Acquiring notes at a discount is a primary strategy for above-market returns, but sound due diligence is required to confirm the note is enforceable and the collateral supports the investment thesis before any purchase closes.

Due Diligence

Due diligence is the investigation a buyer conducts before acquiring a promissory note. It covers verification of all loan documents (note, deed of trust or mortgage, and all recorded assignments), review of the complete payment history, title search, collateral property value assessment, and evaluation of origination-level compliance. Reliable servicer records are a critical due diligence input — a well-maintained payment history maintained by a professional servicer provides verifiable data that directly affects note pricing and investor confidence. See 7 steps to bulletproof due diligence for performing mortgage notes for a complete framework, and 9 note buyer due diligence dealbreakers before close for the items most likely to kill a deal.

Partial Purchase

A partial purchase is a note investing structure in which an investor acquires only a defined segment of the future payment stream on a promissory note — not the entire remaining balance. The original note holder retains ownership of the note once the investor’s payment segment has been fully collected. This provides the original seller with immediate liquidity while preserving future income rights. Professional servicing is essential in partial purchase arrangements because the servicer must accurately track which payments belong to the investor and which revert to the original holder, then execute the transition cleanly when the partial term expires.

Assignments (of Mortgage/Deed of Trust and Note)

An assignment is the legal document and process by which ownership of a promissory note and its corresponding security instrument transfers from one party (the assignor) to another (the assignee). Assignments must be properly executed, notarized, and recorded in county public records to establish a clean chain of title for the new note holder. Incomplete or unrecorded assignments are among the most common title defects found in note acquisitions — and a single gap in the assignment chain can render a note unenforceable at exactly the moment the investor needs to act. See 7 essential documents for a smooth seller carryback transaction for the full document set every closing requires.

Expert Take

The assignment chain is where most note acquisition problems originate. Before purchasing any seller-financed note, confirm that every transfer in the note’s history — from the original lender to each subsequent holder — is documented, notarized, and recorded. A servicer who has maintained the loan from boarding forward provides a defensible paper trail that institutional note buyers expect to see. If that record doesn’t exist at acquisition, establishing it is the first task, not an afterthought.

Truth in Lending Act (TILA) / Regulation Z

The Truth in Lending Act (TILA), implemented through Federal Reserve Regulation Z, requires lenders to clearly disclose credit terms to borrowers before a loan closes — including the annual percentage rate (APR), total finance charges, and the payment schedule. Seller carryback transactions are not automatically exempt from TILA; private sellers who meet the transaction frequency thresholds defined in the regulation are covered lenders with mandatory disclosure obligations. Failure to comply exposes the original lender — and in some circumstances subsequent note holders — to borrower rescission rights and statutory penalties. See 7 costly TILA/RESPA misconceptions every seller financier must avoid for the compliance traps that catch private lenders most often.

Dodd-Frank Act

The Dodd-Frank Wall Street Reform and Consumer Protection Act introduced the Ability-to-Repay (ATR) rule, which requires lenders — including private sellers acting as lenders in carryback transactions — to make a reasonable, good-faith determination that the borrower has the capacity to repay before the loan is made. Seller financiers who exceed the transaction threshold defined in the rule face additional requirements, including restrictions on originator compensation and, in some states, licensing obligations. Professional mortgage servicing supports defensible compliance documentation if a loan’s origination practices are later scrutinized.

Amortization Schedule

An amortization schedule is a table that shows, for every payment in a loan’s life, exactly how much reduces the principal balance and how much pays interest. On a $150,000 private mortgage note at 8% annual interest amortized over 30 years, the first monthly payment of approximately $1,101 applies roughly $1,000 to interest and $101 to principal — a ratio that shifts gradually each month until the loan retires at maturity. For private mortgage servicing, generating and maintaining an accurate amortization schedule is fundamental to correct payment posting, accurate borrower statements, and year-end tax reporting.

Escrow Account

An escrow account is a fund managed by the loan servicer that collects the borrower’s monthly contributions toward property taxes and homeowner’s insurance, then disburses those funds to the appropriate parties when obligations come due. The mechanism ensures these payments are made on time — protecting the lender’s collateral from tax liens and insurance lapses that would undermine the security interest. Managing escrow for private mortgage notes requires meticulous recordkeeping, timely disbursements, and strict RESPA compliance. For operational detail, see 5 things to know about escrow account setup for private mortgage notes and 5 things to know about the escrow disbursement process.

These terms are the operating vocabulary of seller carryback and note investing markets. For questions about how Note Servicing Center manages any of these functions for private mortgage notes, visit NoteServicingCenter.com.