What you need to do right now

To electronically sign a document, you need three things: the document itself (usually a PDF), a tool that adds your signature, and the recipient's instructions on where to send it. The fastest route is often the tool the other person already uses — if they sent you a document through DocuSign, sign it there. If they sent a Word file, you can sign directly in Microsoft Word. If it's a plain PDF with no special setup, free tools like Adobe Reader or Smallpdf let you add a signature in under a minute.

The actual signing takes 30 seconds to 2 minutes. You either draw your signature on screen with a mouse or trackpad, type your name and let the tool convert it to a signature, or upload an image of your actual signature. Then you click to place it where the document shows a signature line, and send the signed file back. That's the whole process.

Key Takeaways

  • If the document came through DocuSign, Docusign, or another signing service, sign it in that same tool — do not download and re-upload it elsewhere.
  • Microsoft Word, Google Docs, and Adobe Reader all have built-in signature tools that work without downloading extra software.
  • You can create a signature by drawing it with your mouse, typing your name, or uploading a photo of your handwritten signature.
  • Free online tools like Smallpdf and ILovePDF add signatures to PDFs without creating an account, though you may see ads.
  • An electronic signature is legally binding in most situations, but some documents (wills, powers of attorney, real estate deeds) have special rules in your state.

Signing through the tool that sent you the document

If someone sent you a link or an email saying "please sign this document," they almost always used a signing service. The most common ones are DocuSign, Adobe Sign, HelloSign, and Docusign. The email will have a button that says "Review and Sign" or "Open Document" — click that button and you go straight to the signing page.

Do not download the document and try to sign it somewhere else. The service tracks who signed, when they signed, and what they agreed to. If you download it and sign it in a different tool, the original sender loses that record and may not accept it. Just follow the link in the email, read what you're signing, and sign where the document shows a signature box. The tool will guide you through each step.

If you lose the email, ask the person who sent it to resend the signing link. Do not try to find the document on your own and sign a different version.

Signing a Word document or Google Doc

If someone sent you a Microsoft Word file (.docx) or a Google Doc, you can sign it without leaving that program. In Word, go to the Insert tab, click Signature Line, and follow the prompts. You'll be asked to type your name and optionally add a title. Once you finish, Word creates a signature line in the document. When you open it again, you can click that line and either draw your signature with your mouse or select a signature image you've already created.

In Google Docs, click Insert, then Drawing, then use the pen tool to draw your signature. Position it where you need it and click Save. This creates an image of your signature that sits in the document, but it's not a legally tracked signature the way DocuSign creates one — it's just a picture. If the other person needs a formal electronic signature record, ask them if they want you to use a different tool.

After you sign, save the file and send it back to whoever asked you to sign it. They'll receive the version with your signature in it.

Signing a PDF with Adobe Reader or a free online tool

If you have a PDF file and no special signing instructions, Adobe Reader (the free version) lets you add a signature. Open the PDF in Adobe Reader, click Fill & Sign on the right side, then click the signature icon. You can draw your signature, type your name, or use an image of your signature. Click where you want it to appear on the page, and it's done. Save the file and send it back.

If you don't have Adobe Reader or prefer not to install it, free websites like Smallpdf, ILovePDF, and Sejda let you upload a PDF, add a signature, and download the signed version. Go to the website, click the signature tool, upload your PDF, draw or type your signature, place it on the page, and download. These sites usually show ads but don't require you to create an account. Some limit how many documents you can sign per month on the free plan.

Be aware that signing a PDF this way creates a picture of your signature, not a legally tracked electronic signature. For most everyday documents — contracts, permission forms, rental agreements — this is fine. For documents with legal weight (wills, powers of attorney, real estate deeds), check your state's rules first, because some states require a specific type of electronic signature for those documents.

Creating a signature you can reuse

If you sign documents regularly, create a signature once and save it so you don't have to draw it every time. The easiest way is to sign a blank piece of paper with a pen, take a photo of it with your phone, and save the image to your computer. Then, when a tool asks you to add a signature, choose the option to upload an image and select that photo.

Alternatively, many signing tools let you create and save a signature the first time you use them. DocuSign, Adobe Sign, and Microsoft Word all have options to save your signature so the next time you sign something, you just click to place it. Draw your signature once, check the box that says "Save this signature," and you're done.

Keep your signature image in a safe place on your computer — not on a shared drive or in a folder someone else can access. Treat it the way you'd treat a handwritten signature.

What happens after you sign

Once you've signed and sent the document back, the other person receives it with your signature on it. If you used a service like DocuSign, that service also sends you both a confirmation email with a timestamp and a record that you signed. Keep that email — it's proof you signed the document and when you signed it.

If you signed a Word file or PDF and sent it back as an attachment, there's no automatic record. The other person has the signed file, but there's no timestamp or proof of when you signed it. For important documents, ask the other person to confirm they received it and to tell you the date they received it. You can then keep that confirmation email as your record.

If you made a mistake and signed the wrong version, tell the person who sent it right away. They can send you the correct version to sign, or in some cases they can void the first signature and ask you to sign again.

Special rules for certain documents

Most documents can be signed electronically without any special process. Contracts, agreements, permission forms, rental applications, and medical paperwork all work fine with an electronic signature. However, a few types of documents have state-specific rules that may require a particular type of signature or a witness.

Wills, powers of attorney, and real estate deeds sometimes fall into this category. Before you sign these electronically, check your state's rules or ask a lawyer. Some states accept any electronic signature for these documents. Others require a notarized electronic signature, which means a notary public has to verify your identity and witness your signature through a video call. A few states still require a handwritten signature on paper for certain documents, though this is becoming less common.

If you're unsure whether an electronic signature is acceptable for what you're signing, ask the person requesting your signature. They usually know the rules for their state or industry.

Frequently Asked Questions

Is an electronic signature legally binding?

Yes, in most situations. The federal ESIGN Act and most state laws recognize electronic signatures as legally valid for contracts and agreements. However, some documents — like wills and real estate deeds — have special rules that vary by state. If you're signing something important, ask the other person whether an electronic signature is acceptable for that type of document in your state.

Can I sign a document on my phone?

Yes. If the document came through a signing service like DocuSign, you can open the link on your phone and sign there. If it's a PDF, you can use a free app like Adobe Reader or Smallpdf's mobile app to add your signature. Drawing a signature with your finger on a phone screen is usually easier than with a mouse on a computer.

What if I don't have a scanner to upload an image of my signature?

You don't need one. You can draw your signature directly in the signing tool using your mouse or trackpad, or type your name and let the tool convert it to a signature. Both are legally valid. If you want to use an image of your handwritten signature, you can take a photo with your phone camera and upload that instead of scanning.

Can someone forge my electronic signature?

If you're using a service like DocuSign or Adobe Sign, it's difficult. Those services track who signed and when, and they require you to verify your identity. If you're just drawing a signature in a PDF or Word document, it's easier to copy — anyone with the file can copy and paste your signature. For important documents, use a formal signing service that creates a record.

What should I do if I accidentally signed the wrong document?

Tell the person who sent it immediately. If you used a signing service, they may be able to void the signature. If you signed a PDF or Word file, ask the person to disregard that version and send you the correct one. Keep a record of when you notified them in case there's a question later about which version you actually signed.