This glossary defines the 15 core terms private mortgage lenders, note investors, and seller financing participants encounter in every transaction. From promissory notes and deeds of trust to balloon payments and usury laws, knowing these terms protects your investment, ensures compliance, and prepares you for successful note boarding and servicing.

Whether you are structuring a seller carryback deal, evaluating a note for purchase, or onboarding a loan with Note Servicing Center, these definitions establish the shared language required for every step of the process.

Seller Carryback Financing (Seller Financing)

Seller carryback financing is a transaction structure where the property seller acts as the lender, extending credit directly to the buyer to cover part or all of the purchase price. The seller holds a promissory note secured by a mortgage or deed of trust and receives payments over time rather than a lump sum at closing. This arrangement gives buyers an alternative financing path when bank credit is unavailable and gives sellers a structured income stream with installment-sale tax treatment. For note investors and lenders evaluating these transactions, complete documentation is the first requirement — an underdocumented seller carryback note is difficult to enforce and nearly impossible to sell. See our seller carryback document checklist for the full list of required instruments.

Promissory Note

A promissory note is the legally binding written obligation by which a borrower promises to repay a specific principal sum to the lender on a defined payment schedule or on demand. In private mortgage and seller financing, this document establishes the principal balance, interest rate, payment amount, payment frequency, maturity date, prepayment terms, and default remedies — making it the primary evidence of the debt and the document on which every enforcement action depends. Proper drafting is non-negotiable: courts and note investors both require clear, enforceable language. Ambiguity in the promissory note becomes a servicing problem, a legal problem, and a valuation problem at every stage of the note’s life.

Deed of Trust / Mortgage

A deed of trust or mortgage is the security instrument that pledges the financed real property as collateral for the promissory note, converting an unsecured debt into a secured note. In deed-of-trust states, three parties are involved: the borrower (trustor), the lender (beneficiary), and a neutral third-party trustee who holds legal title until the loan is satisfied or foreclosed. In mortgage states, two parties are involved — the borrower and the lender — and the instrument creates a lien on the property rather than a title transfer. Both instruments must be recorded in the county where the property is located to establish lien priority against subsequent creditors. Without a properly recorded and executed security instrument, a lender holds an unsecured obligation, not a secured private mortgage note.

Loan Servicing

Loan servicing encompasses the complete administrative management of a private mortgage note from disbursement through final payoff: collecting payments, applying funds to principal and interest, managing escrow accounts, tracking insurance and tax compliance, handling delinquencies, reporting to investors, and maintaining records required by state and federal law. For private mortgage investors, professional servicing is what separates a performing note portfolio from a compliance liability. The most common servicing failures — missed escrow disbursements, delinquency notices sent outside required timelines, and inaccurate 1098 reporting — all trace back to inadequate servicing infrastructure. Outsourcing to a qualified private mortgage servicer eliminates these exposure points while freeing the lender or investor to focus on capital deployment.

Escrow Account

An escrow account is a funds reserve held by the loan servicer on behalf of both the borrower and lender to collect and disburse recurring property-related expenses — property taxes and homeowner’s insurance premiums. The borrower contributes to the escrow reserve with each monthly payment, and the servicer disburses directly to taxing authorities and insurance carriers when obligations come due. Proper escrow administration protects the collateral from tax liens and insurance lapses, both of which create prior claims that jeopardize the private lender’s security position. For qualifying private mortgage transactions, compliant escrow management also satisfies RESPA disclosure and disbursement obligations. Review the five essentials of escrow account setup before boarding any note that requires escrow administration.

Balloon Payment

A balloon payment is the large lump-sum payment — consisting of the full remaining principal balance — that comes due at the end of a shortened loan term. In private mortgage and seller financing, payments are sized as if the loan amortizes over 30 years, but the outstanding balance is due at a shorter maturity — five or seven years is standard. As an illustrative example: a $200,000 note at 7% interest amortizing over 30 years carries a monthly payment of roughly $1,331, but if the note carries a five-year term, the borrower owes the remaining principal balance of approximately $191,000 in a single balloon payment at maturity. The balloon date, payoff calculation method, and advance notice requirements must be stated clearly in the promissory note to prevent confusion and avoid disputes when the balloon comes due.

Due-on-Sale Clause

A due-on-sale clause — also called an alienation clause — is a promissory note or deed of trust provision that gives the lender the right to demand immediate full repayment if the borrower transfers or sells the secured property without the lender’s prior written consent. This clause prevents an unapproved transferee from assuming the existing loan and protects the lender from inheriting a borrower it never underwrote. For note investors, a properly drafted due-on-sale clause is a key enforcement tool: when the property changes hands, the lender receives full payoff or formally underwrites and approves the incoming buyer. Notes without this clause carry assumption risk that affects both yield and secondary-market demand.

Land Contract (Contract for Deed)

A land contract — also called a contract for deed — is a seller-finance structure where the seller retains legal title to the property while the buyer takes possession and assumes the practical responsibilities of ownership. Legal title does not transfer to the buyer until all payments, including interest, are made in full. This structure is used in private real estate transactions where the buyer is unable to obtain conventional financing. Servicers and investors working with land contracts face different legal workflows than standard mortgage servicers: the default remedy is forfeiture rather than foreclosure in many states, and the procedures, timelines, and documentation requirements differ substantially from standard deed-of-trust or mortgage practice. Specialized compliance knowledge is required before accepting a land contract for servicing.

Wraparound Mortgage

A wraparound mortgage is a junior seller-finance instrument where a new loan wraps around an existing underlying mortgage that the seller has not paid off. The buyer makes one payment to the seller-lender at the wraparound rate; the seller then remits the underlying loan payment from those funds and retains the interest rate spread as profit. Effective wraparound servicing requires tracking two payment streams simultaneously and confirming that the underlying senior lien is paid current each period. A delinquency on the underlying loan — regardless of whether the buyer is current on the wrap payment — exposes the collateral to foreclosure by the senior lender, which destroys the wrap lender’s position entirely.

Partial Release

A partial release is a lender agreement that removes a specified portion of the collateral from the mortgage or deed of trust lien while the remaining property continues to secure the outstanding loan balance. This is most common when a large land parcel is financed and the borrower needs to convey individual lots as they sell. Executing a partial release requires calculating whether the remaining collateral provides adequate security for the unpaid principal — releasing more than the loan’s equity coverage allows weakens the lender’s position and creates recovery risk. Partial release thresholds, calculation methods, and approval procedures should be defined in the original loan documents at closing, not negotiated after the fact under borrower pressure.

Note Investor (Private Mortgage Investor)

A note investor — or private mortgage investor — is an individual or entity that purchases an existing promissory note and its associated security instrument from the original lender, acquiring the right to collect future borrower payments. Notes are purchased at a discount to face value that reflects the interest rate, remaining term, borrower payment history, and collateral quality. For the original lender, a note sale provides immediate liquidity without waiting for the loan to amortize. For the investor, it creates a fixed-income return secured by real property. Complete, compliant documentation is the single most influential factor in note valuation: defective or incomplete loan files suppress investor demand and reduce purchase price in direct proportion to the severity of the defects.

Subordination Agreement

A subordination agreement is a recorded legal document that voluntarily alters the priority ranking of competing liens on a property, allowing a previously senior lien to accept a lower priority position so that new financing achieves first-lien status. In private mortgage transactions, a first-position lender agrees to subordinate their lien to accommodate additional financing the borrower is adding. Lien priority controls the order of repayment in a foreclosure: senior lienholders are satisfied first, and junior positions absorb losses first. A private lender who agrees to subordinate without fully modeling the effect on their recovery position accepts risk that must be accounted for in loan terms and borrower qualifications before any agreement is executed.

Default Management

Default management encompasses the full range of processes a servicer executes when a borrower fails to meet loan obligations: early-intervention outreach, loss mitigation analysis (loan modifications, forbearance agreements, repayment plans, short payoffs), formal collection activity, and — when no other resolution is viable — foreclosure initiation. The most costly default mistakes private lenders make are waiting too long to intervene, skipping state-required notices, and failing to document loss mitigation communications contemporaneously. Professional servicers bring established workflows, regulatory expertise, and documentation discipline that individual lenders handling their own defaults lack — reducing both loss severity and legal exposure.

Usury Laws

Usury laws are state statutes that set the maximum legal interest rate a lender is permitted to charge on a loan. Private mortgage and seller financing transactions are subject to the usury statutes of the state where the property is located, and these limits vary by state and by loan category. Federal law preempts state usury limits for certain chartered financial institutions, but private lenders and seller-financiers do not benefit from those preemptions in most circumstances. A promissory note that violates state usury law is unenforceable, subject to statutory penalties, or both — any of which destroys the note’s value and the lender’s recovery options. Confirming rate legality in the applicable jurisdiction is a required step before any private mortgage closes.

Non-Recourse Note

A non-recourse note limits the lender’s recovery in a default strictly to the collateral property. If the property sells for less than the outstanding loan balance in foreclosure, the lender absorbs the deficiency — the borrower’s other assets and income are off limits. A recourse note removes this restriction: the lender retains the right to obtain a deficiency judgment and pursue the borrower personally for any shortfall after the collateral is liquidated. Non-recourse structures are more common in commercial private lending than in residential seller financing. Note investors must identify recourse status during due diligence, as it directly affects risk exposure, required yield, and default recovery strategy when underwriting a note purchase.

Expert Take

The documentation failures Note Servicing Center identifies most at loan boarding trace back to the same root issues: promissory notes that omit payment frequency or fail to specify balloon date mechanics, security instruments recorded in the wrong county or under a misspelled borrower name, and conflicting maturity dates between the note and the deed of trust. These are not minor clerical errors — they are enforcement gaps. Courts and note investors treat them as material defects that impair the note’s value and the lender’s recovery options. Fix the documents at origination or pay to cure them later under time pressure and often with a distressed borrower involved.

Private mortgage lenders and note investors who build fluency in these terms close faster, structure stronger instruments, and identify problems before they become losses. If you are evaluating a private mortgage servicer for your portfolio, start with these 11 questions to ask before you sign. Note Servicing Center services private mortgage notes across all 50 states and is available to discuss your note boarding and compliance requirements.