To sign something electronically, open the document in a signing tool, place your mark in the signature field, and save or submit the finished file. Under the federal Electronic Signatures in Global and National Commerce Act (the ESIGN Act), that electronic mark carries the same legal weight as an ink signature for almost every transaction you’re likely to encounter.1Office of the Law Revision Counsel. 15 USC 7001 – General Rule of Validity The law defines an electronic signature broadly: any electronic sound, symbol, or process attached to a record and adopted by someone with the intent to sign it.2Office of the Law Revision Counsel. 15 USC Ch. 96 – Electronic Signatures in Global and National Commerce A typed name, a finger-drawn squiggle, or a click on an “I Accept” button can all qualify, as long as you meant to agree.
Signing From an Emailed Link
Most electronic signing happens on a hosted platform like DocuSign or Adobe Sign. The sender sets everything up; you just respond. Click the link in your email, review the document on the page that opens, tap or click each highlighted signature or initial field, and press the “Finish” or “Complete” button at the end. The platform places your signature in the right spots, timestamps each action, and emails you a copy when it’s done.
Signature fields are usually colored and labeled, and the system won’t let you submit until every required field is filled. For a multi-page document, use the sidebar or “next” button to jump between the spots that need your initials, date, or full signature. Before you press complete, scroll back through to make sure your mark doesn’t sit on top of printed text. Once you submit, the document locks against further edits and the platform applies a tamper-evident seal. If anything needs to change after that, the whole process restarts with a new version.
Signing a PDF Yourself With Free Tools
When someone emails you a PDF and asks you to sign and send it back, you don’t need a paid service. Every major operating system now has a built-in signing tool:
- Mac (Preview): Open the PDF in Preview, click the Markup toolbar, choose the Signature tool, and create a signature by drawing on the trackpad or holding a signed piece of paper up to the camera. Drag the saved signature onto the right spot in the document.
- Windows (Edge): Open the PDF in Microsoft Edge, click “Add text” to type or use the Draw tool to write your signature directly on the page, then save the file.
- iPhone and iPad: Open the PDF in Files or Mail, tap the Markup icon (pen tip), tap the “+” button, and select Signature. Draw with your finger.
- Android: Open the PDF in Google Drive’s viewer, pick the annotation tool, and draw your signature. Google Docs also lets you insert a drawing as a signature.
These free tools produce a legally valid electronic signature because they capture your intent to sign. They’re fine for freelance contracts, rental applications, and most internal paperwork. Where they fall short is proof. They don’t generate a certificate of completion recording your IP address, timestamp, or identity verification, so if someone later disputes the signature you have less evidence to work with. For high-value or regulated contracts, a dedicated platform with audit logging is worth the cost.
Creating Your Signature
Free tools and paid platforms generally offer three ways to create the signature itself: draw it with a mouse, trackpad, or finger; upload a photo of your handwritten signature; or type your name and pick a cursive-style font. Drawing looks the most personal. If you upload a photo, use a clean image with strong contrast on a white background. Typing is fastest, and it’s legally fine, because the visual style of the signature doesn’t affect whether it’s enforceable.
Save the signature for reuse once you’ve made one you like. Most tools let you store it and apply it to future documents, which keeps the look consistent and spares you from redrawing every time. Test the placement in a blank PDF first so you know the size and clarity will work on real documents.
Documents You Can’t Sign This Way
Federal law carves out specific categories where an electronic signature doesn’t count, and getting this wrong on something like a will can invalidate it entirely. Under 15 U.S.C. ยง 7003, the ESIGN Act does not apply to:3Office of the Law Revision Counsel. 15 USC 7003 – Specific Exceptions
- Wills, codicils, and testamentary trusts, which have to follow your state’s execution rules (almost always ink and witnesses).
- Adoption, divorce, and other family law documents governed by state rules.
- Court orders, official court notices, briefs, and pleadings tied to court proceedings.
- Certain consumer notices: cancellation of utility service, foreclosure or eviction notices on a primary residence, termination of health or life insurance, and product recalls.
- Documents required to accompany the transport or handling of hazardous materials, pesticides, or toxic substances.
- Most Uniform Commercial Code transactions, with limited exceptions for parts of Articles 1, 2, and 2A.
Your state may add restrictions of its own. When the document type seems unusual and the stakes are high, confirm whether a wet signature is required before signing on a screen.
What Makes the Signature Actually Hold Up
Intent is the linchpin of a valid electronic signature. If you can’t show that the signer meant to approve the specific document, the signature is vulnerable to challenge. Three things strengthen that proof.
The Consent Screen
When a business is legally required to give you information in writing, it can send it electronically only after meeting ESIGN consent rules.1Office of the Law Revision Counsel. 15 USC 7001 – General Rule of Validity Before you agree, it has to tell you whether you can request paper instead, how to withdraw your consent and what that withdrawal might cost you, what hardware and software you need to view and keep the records, and whether your consent covers just this transaction or ongoing communications like monthly statements. This is the checkbox you see at the start of most online signing flows. If the business skips it, the underlying contract isn’t automatically void, but the company can lose the ability to rely on the electronic version to satisfy a separate writing requirement, which can force it to redeliver paper copies and reset disclosure timelines.
The Audit Trail
A strong audit trail is the single best defense against someone claiming they never signed. Dedicated platforms produce a certificate of completion listing the signer’s email, IP address, action-by-action timestamps, and the identity-verification method used. If the signature ends up in court, that certificate is your main evidence. Save it next to the signed document itself.
Identity Verification
For sensitive documents, platforms can layer identity checks on top of the email link. Knowledge-based authentication pulls questions from public records and credit data, asking you to confirm details like a former address or a past lender. The IRS uses this method for e-filed returns, and if a taxpayer can’t answer the questions after three attempts, a handwritten signature is required instead.4Internal Revenue Service. Frequently Asked Questions for IRS e-File Signature Authorization SMS codes and government-ID photo matching are other options you’ll see offered.
If the Document Needs to Be Notarized
Notarization doesn’t block electronic signing. The ESIGN Act says that when a law requires a signature to be notarized, acknowledged, verified, or made under oath, the requirement is met if the authorized person’s electronic signature and all other required information are attached to or logically associated with the record.1Office of the Law Revision Counsel. 15 USC 7001 – General Rule of Validity In practice this takes the form of remote online notarization, where a notary verifies your identity on a video call and applies an electronic seal. Most states authorize it, though a few still don’t, so check your state’s rules before you count on the option.
Keeping the Signed File
Signing is only half the job. If a law requires you to retain the contract, the electronic version satisfies that requirement only as long as it accurately reflects the original and stays accessible to anyone legally entitled to see it, for the full retention period, in a form that can be reproduced later.1Office of the Law Revision Counsel. 15 USC 7001 – General Rule of Validity A PDF saved to your drive clears that bar. A phone screenshot you delete during a storage cleanup does not. For tax records, the IRS requires electronic storage systems to keep records legible, readable, and tamper-resistant for as long as the contents matter to tax administration.5Internal Revenue Service. Revenue Procedure 97-22
After every signing session, download the final executed PDF and the audit trail certificate if one was generated. Save both in two places, a local drive and a cloud service. If the platform that hosted the signing shuts down or purges old records, your copies are what you have left. For long-running contracts like mortgages or partnership agreements, keep the files reachable for the life of the agreement plus several years.