Whether you're new to eNotes or ready to begin integration, this FAQ covers everything you need to know — from the basics of how electronic notes work to the legal framework, technology requirements and steps to get started.
eNote: A Transferrable Record (a form of a promissory note) in electronic form that complies with eCommerce laws (UETA and ESIGN).
Controller: The MERS eRegistry participant with Control of a Digital Asset — for example, the Authoritative Copy of an eNote. The Controller has the right to enforce the eNote, making them the functional equivalent of the holder of a paper promissory note.
Location: The MERS eRegistry participant that maintains the Copy of a Digital Asset — for example, the Authoritative Copy of an eNote or a copy of an eHELOC.
Master Servicer: The Participant named on MERS eRegistry that is authorized by the Controller to perform certain MERS eRegistry transactions on the Controller’s behalf.
Authoritative Copy: The unique, identifiable, and unalterable copy of the Transferable Record (eNote) maintained within the Control environment established by the Controller.
MIN (Mortgage Identification Number): A unique identifier assigned to each loan, used on both the MERS System and the MERS eRegistry.
eVault: An application that serves as an electronic repository for delivery and storage of Digital Assets and other related files.
Tamper-Evident Digital Signature (Tamperseal): A cryptographic hash value applied to an eNote after closing that detects any subsequent alterations.
eNotes streamline the entire post-closing process. Because they're electronic, they eliminate transportation costs, reduce the risk of lost or destroyed notes, and speed up the certification process. Downstream partners can instantly verify a document's integrity using its tamper-evident digital signature. For these reasons, loans represented by eNotes are often more valuable to investors than equivalent paper-based loans.
An eNote is a promissory note created, signed, and stored in electronic form. It must comply with eCommerce laws (UETA and ESIGN), be formatted to the MISMO SMART Doc® v1.02 standard, contain a valid Mortgage Identification Number (MIN), and include language identifying MERSCORP Holdings as the entity maintaining the registry used to identify the Controller and Location.
eNotes are typically generated from data in your Loan Origination System (LOS). Your LOS may create eNotes directly, or you may work with a document provider or eClosing platform that generates them — often using data from your ULDD file. The MISMO SMART Doc v1.02 format combines XML data with an XHTML view section to meet investor requirements. Your LOS, eVault, or document vendor can provide more technical detail.
After a borrower signs an eNote and closing is complete, a tamper-evident digital signature — also called a tamperseal or hash value — is applied to the document. Think of it as a digital fingerprint: it's the result of a mathematical calculation that accounts for every character, space, and punctuation mark in the document. Any change to the eNote, no matter how small, produces a completely different hash value.
When the eNote is registered on the MERS eRegistry, that hash value is stored as part of the registration record. Downstream partners who receive a copy of the eNote can submit a verification transaction to confirm that their copy's hash value matches the one on file — proving the document hasn't been altered.
The term "eMortgage" is used in different ways across the industry, so the answer depends on context. Broadly, an eMortgage is a mortgage loan where the closing documents — including at minimum the promissory note — are created, executed, and stored electronically. Under that definition, any loan closed with an eNote is an eMortgage.
If some documents (such as title documents or notarized instruments) remain on paper, the transaction is typically called a Hybrid eMortgage or eClosing. If the entire closing package is electronic, it's sometimes called a Full eMortgage or eClosing.
A paper note that meets the definition of a Negotiable Instrument under the Uniform Commercial Code (UCC) — it's transferred by physically delivering the original, ink-signed document along with an endorsement.
An eNote is a Transferable Record as defined by UETA and ESIGN. Because there's no physical original to pass from hand to hand, the eCommerce laws require a registry system that reliably identifies who is in control of the eNote at any given time. That's the role the MERS eRegistry plays. Rather than endorsements and physical delivery, eNote ownership is transferred via a Transfer of Control on the MERS eRegistry.
No — like paper promissory notes, eNotes are not typically required to be notarized and are never required to be recorded.
The MERS eRegistry is the mortgage industry's sole authorized registry for identifying the current Controller (holder) and Location (custodian) of the Authoritative Copy of an eNote. It serves as the industry's System of Record for legal eNote ownership.
The eRegistry is a key component of the ecosystem of systems and processes required to satisfy the "control" requirements of Section 201(c) of the ESIGN Act and Section 16(c) of UETA. Under the terms of the GSE Uniform Electronic Promissory Note, all transfers of an eNote must be registered on the MERS eRegistry.
With a paper note, physical possession of the original ink-signed document establishes your right to enforce it.
With an eNote, every digital copy is identical to every other copy — there's no "original" you can hold in your hand. The law accounts for this by requiring a system that reliably identifies who has control of the eNote. The MERS eRegistry fills that role by maintaining a definitive record of the Controller and Location at all times.
No. Your eVault stores your eNotes. The MERS eRegistry only stores the registration record — including the hash value of the tamper-evident digital signature — not the eNote document itself. When you register an eNote, your eVault submits a copy to the eRegistry for the initial registration process, but the eRegistry does not retain that copy afterward.
The original lender or payee must be named as the initial Controller when an eNote is first registered. After that, Control can be transferred to other MERS eRegistry participants as the loan changes hands — for example:
The Location identifies who stores the Authoritative Copy. Often the Controller and Location are the same party, but if the Controller doesn't have its own eVault, it may designate a document custodian as the Location instead.
Yes. The MERS eRegistry is the only national registry used by the mortgage industry for identifying the Controller and Location of the Authoritative Copy of an eNote.
Yes. The GSE Uniform Electronic Promissory Note requires its use for all eNotes purchased by the GSEs, which also require MERS eDelivery to deliver the eNote to the GSE’s eVault (see below for more information on MERS eDelivery). Ginnie Mae, the Federal Home Loan Banks, and major industry aggregators similarly require that their eNotes be registered on the MERS eRegistry.
No. The eRegistry can be used regardless of loan amount — loan size only determines which investors may wish to purchase the loan. Non-conforming loans can be registered just like conforming ones.
It's also worth noting that certain types of loan agreements that don't fully meet the definition of a Transferable Record — such as an eHELOC — may still be registered on the MERS eRegistry as electronic records and managed under other legal control frameworks, such as UCC Article 12 () or UCC Article 8 (digital debt obligation). Consult legal counsel for guidance on specific products.
An eVault serves two essential functions: storing eNotes and other electronic documents, and submitting transactions to the MERS eRegistry via a system-to-system interface. (The eRegistry's user interface is inquiry-only — transactions must be submitted programmatically.)
Most participants will need access to an eVault, though a few specific business models allow one party to report transactions on another's behalf. For example, in a warehouse lender/custodian relationship, the Delegatee for Transfer arrangement allows the custodian to act on behalf of the lender. In a subservicer relationship, it's possible that only the subservicer would need eVault access.
No. MERS eDelivery securely delivers electronic documents in a variety of formats (SMART Doc, PDF, TIFF, etc.), but it does not validate or store them. An eVault is still required.
Your eVault must be able to identify whether the eNote it holds is the single Authoritative Copy. The method varies by provider, but most eVaults allow you to generate a PDF of the eNote with a watermark or overlay indicating its authoritative status.
Originating eNotes requires a functioning ecosystem of at least six components working together: the eCommerce legal framework (UETA/ESIGN), investor requirements, an eClosing platform, an eVault, proper eNote language in the documents the borrower signs, and the MERS eRegistry. We recommend assembling a project team with representatives from technology, operations, compliance, and legal to ensure all components are in place.
There are two main paths:
In either case, MERSCORP will help you integrate, set up procedures, and complete any required transaction testing.
No. An eNote does not need to be secured by a mortgage or deed of trust naming Mortgage Electronic Registration Systems, Inc. (MERS) as mortgagee. However, always verify your investor requirements. If your security instrument does name MERS as mortgagee, that mortgage must be recorded in the applicable county lands records and separately registered on the MERS System using the same MIN as the eNote — this is a distinct process from eNote registration on the MERS eRegistry.
eNotes tend to have fewer errors than paper notes because data is entered automatically. When errors do occur, they fall into two categories:
Yes. The Controller of an eNote may convert it to a paper-based promissory note. When borrowers sign an eNote, they agree in advance that it may be converted to paper, that the electronic signature will constitute a valid wet signature on that paper note, and that their obligations survive the conversion.
The conversion process should be performed via the eVault that maintains the Authoritative Copy. To complete the conversion, you must deactivate the eNote on the MERS eRegistry. You should also attach a schedule of all prior transfers of control to the paper note, providing the equivalent of a traditional endorsement chain.
No. An eNote must be originated as an eNote from the start, because the borrower must affirmatively agree that the note will be treated as a Transferable Record (an eNote) and to the electronic signing process at the time of origination.
There are two main components:
For more detail, see the MERS eRegistry Procedures Manual or the QA tutorial in the MERS Learning Center.
Yes, but you must also sign the MERS eRegistry Addendum, which incorporates additional terms related to eRegistry use into your existing membership. If you're not yet a MERS System Member, you'll need to sign both the Membership Agreement and the Addendum.
There are no additional membership fees for becoming an eRegistry participant, though transaction fees may apply depending on the types of transactions you submit. See the MERS eRegistry Pricing Schedule for details.
Review our Preparing for MERS eRegistry Integration checklist, which covers internal processes, technology requirements, and trading partner considerations. Make sure all relevant business partners and vendors — including eVault providers, custodians, servicers, and subservicers — understand the fundamentals of electronic notes before you begin.