On a legal document, “/s/” is shorthand for “signed,” and a typed name between forward slashes — like /s/ Jane Doe — is an electronic signature. So what /s/ means in a signature is simply that the person named has signed the document electronically instead of in ink. Under federal law, that typed notation carries the same legal weight as a handwritten signature for most transactions, with a few important exceptions like wills and some family law papers.
What /s/ Looks Like and How It Works
A /s/ signature is what lawyers and courts call a conformed signature. Instead of scanning handwriting or drawing on a touchscreen, the signer types their name between two forward slashes on the signature line. The slashes act as visual markers: they separate the typed name from the surrounding text and signal that the name is functioning as a signature rather than just a mention of a person.
So on a contract, “/s/ John Smith” where the ink signature would normally sit means John Smith has signed. The notation is purely text. It looks the same regardless of who typed it, which is both its convenience and its vulnerability. What gives it legal effect is not its appearance but the signer’s intent to be bound, supported by the legal framework that recognizes electronic signatures.
This is different from a facsimile signature (a scanned or photocopied image of real handwriting) and different from a signature drawn with a stylus on a tablet. Those involve an image. A /s/ signature is just letters and slashes.
Is a /s/ Signature Legally Binding?
Yes, for most documents, and the law behind it is well settled. The Electronic Signatures in Global and National Commerce Act, usually called the E-SIGN Act, is the federal statute. It states that a signature or contract “may not be denied legal effect, validity, or enforceability solely because it is in electronic form.”1Office of the Law Revision Counsel. 15 USC 7001 – General Rule of Validity Most states have also adopted the Uniform Electronic Transactions Act (UETA), which says much the same thing at the state level.
The E-SIGN Act defines an electronic signature as “an electronic sound, symbol, or process, attached to or logically associated with a contract or other record and executed or adopted by a person with the intent to sign the record.”2Office of the Law Revision Counsel. 15 USC 7006 – Definitions A typed name between forward slashes fits that definition cleanly. The “/s/” is the symbol, it sits on the signature line (logically associated with the document), and the person typing it does so to sign.
Three things need to be true for the signature to hold up:
- The signer intended to sign. Courts look at the circumstances: did the person type the /s/ themselves, or authorize someone else to, and did they understand they were agreeing?
- Both parties consented to doing business electronically. You cannot force an electronic signature on someone who wants paper.
- The signature is connected to the specific document it applies to. A /s/ floating in an email with no clear link to an attached agreement will not do the job.
Where You’ll See /s/ Used
Federal courts are where most people encounter /s/ signatures first. Attorneys filing through the CM/ECF electronic filing system sign their documents by typing /s/ followed by their name on the signature line. The act of filing under their court login credentials is itself treated as their electronic signature.3United States District Court. Preparing Your CM/ECF Filing
The U.S. Patent and Trademark Office uses its own version, called an S-signature. The signer’s name must be between forward slashes, like /Noah B Dey/, and the signer must personally type it. Patent practitioners also have to include their registration number within or next to the signature.4United States Patent and Trademark Office. Signature Examples
The IRS accepts electronic signatures on a list of approved forms, including common returns like the 1040, 941, and 1065. Acceptable methods include typed names, scanned handwritten signatures, PINs, and signatures created through approved third-party software.5Internal Revenue Service. IRS Electronic Signature (e-Signature) Program – IRM 10.10.1 Forms not on the approved list still need an ink signature.
In everyday business, /s/ signatures turn up on emailed PDFs of contracts, employment agreements, nondisclosure agreements, vendor contracts, and internal approvals. The same E-SIGN Act framework applies; the formality of the signature block is just whatever the parties agree to.
How to Format It Correctly
Getting the format right matters more than people expect. In some settings, like USPTO filings, a badly formatted signature is treated as no signature at all.
The basic form is: type “/s/” followed by the signer’s full legal name on the signature line. A full federal court signature block usually includes:
- The /s/ line, where an ink signature would go: /s/ Full Name
- The typed name repeated directly beneath
- Address, phone number, and email
- Title, bar number, or registration number where required6U.S. Bankruptcy Court for the Northern District of Indiana. Electronic Signature and Signature Block
Common mistakes that can invalidate the signature: back slashes instead of forward slashes, doubled slashes (//name//), a slash missing on one side, or symbols and punctuation marks inserted inside the slashes.4United States Patent and Trademark Office. Signature Examples Those rules come straight from USPTO practice, but they are good discipline anywhere. Keep it clean: two forward slashes, full name, nothing extra.
For ordinary business contracts there is no single mandated format. Clarity is the test. A reader should be able to tell at a glance who signed, when, and in what capacity.
Documents That Still Require Ink
The E-SIGN Act carves out several categories of documents that cannot be signed with /s/ or any other electronic signature. The most important exclusions are wills, codicils, and testamentary trusts, along with family law matters like adoption and divorce documents.7Office of the Law Revision Counsel. 15 USC 7003 – Specific Exceptions UETA has similar exclusions for wills and testamentary trusts.
Other federal exclusions cover cancellation notices for utility services, insurance, and health or life benefits, product recall notices, and documents dealing with hazardous or toxic substances. Court orders and official court documents are also outside the E-SIGN Act’s scope.7Office of the Law Revision Counsel. 15 USC 7003 – Specific Exceptions For these, ink on paper is still the rule.
A few states have started allowing electronic wills, but most still require a handwritten signature and witnesses physically present. If you are doing estate planning, assume the traditional requirements apply unless an attorney in your state tells you otherwise. An improperly signed will can be thrown out entirely, which sends the estate through default inheritance rules instead of the plan the signer actually wanted.
Protecting a /s/ Signature From Later Challenge
The settled question is whether /s/ signatures are legally valid in general. The question that actually causes fights is whether a specific person authorized a specific /s/ on a specific document. Someone types “/s/ Jane Doe” on a contract. Months later Jane says she never agreed. What then?
The party relying on the signature usually has to prove it is authentic. That is why the paper trail around the signature matters as much as the signature itself. A /s/ on a document emailed from Jane’s own work account, after a chain of negotiation messages where she discussed the terms, is far more defensible than a /s/ with nothing behind it. Commercial signing platforms like DocuSign and Adobe Sign build this evidence automatically through identity verification, timestamps, and access logs. A bare /s/ typed into a Word document has none of that infrastructure.
The E-SIGN Act also requires that electronic records be kept in a form that accurately reflects the original and stays accessible for as long as the law requires retention, and that they can be accurately reproduced later.1Office of the Law Revision Counsel. 15 USC 7001 – General Rule of Validity In practice, save the signed document in a format that cannot be easily altered, like a locked PDF, and store it somewhere reliable.
If you are using /s/ signatures without a commercial platform, a few habits make a real difference. Have the signer send the signed document from their own email account. Save the full email chain. Keep anything in writing where the parties agreed to sign electronically. For high-value contracts, add a short clause above the signature line confirming that the signer intends their typed name as a legal signature. None of this is required on every deal, but together it makes the signature much harder to disown later.