What an electronic signature is and when you can use it

An electronic signature is a digital version of your handwritten signature. It can be as simple as typing your name, drawing your signature with a mouse or touchpad, or using a scanned image of your actual signature. Most electronic signatures are legally valid for contracts, forms, and documents — though a few specific things like wills and real estate deeds still require a handwritten signature in most places.

You will encounter electronic signatures in two main situations: signing documents that someone else sends you, and creating a signature to use on documents you send to others. This guide covers both, starting with the simplest methods and moving to more formal options.

Key Takeaways

  • The fastest way to sign a document is to type your name, draw your signature with your mouse or finger, or insert an image of your handwritten signature into the document itself.
  • Most email and document services — Gmail, Microsoft Word, Google Docs, Adobe Acrobat — have built-in signature tools that take less than five minutes to set up.
  • If you need to sign many documents or want a more formal signature, use a dedicated service like DocuSign or Adobe Sign, which creates a record that the document was signed and when.
  • Electronic signatures are legally valid for most business and personal documents, but check with your bank or government agency if you are unsure whether a specific document requires a handwritten signature.

Creating a typed or drawn signature in Word or Google Docs

If you are signing a document you created yourself or one someone sent you as a Word file or Google Doc, you can add your signature without any extra software. In Microsoft Word, go to the Insert tab, select Signature Line, and follow the prompts to add a blank line where you will sign. You can then type your name, draw your signature with your mouse or trackpad, or insert an image of your signature.

In Google Docs, the process is slightly different. Open the document, click Insert, then Drawing, then Create New. A drawing window opens where you can use your mouse or touchpad to draw your signature. Click Save and Close, and the signature appears in the document. This method works on phones and tablets too — you can draw your signature with your finger on the touchscreen.

Both methods are fast and work for informal documents like internal memos, personal agreements, or forms you are filling out for yourself. They do not create a legal record that you signed on a specific date, so they are less suitable if you need proof of when the signature happened.

Setting up a reusable signature in Gmail and Outlook

If you sign many emails or documents, create a signature once and reuse it automatically. In Gmail, click the Settings gear icon, select See All Settings, then go to the Signatures tab. Click Create New, type or paste your name, and optionally add a title, phone number, or company name. Click Save Changes, and from now on that signature appears at the bottom of every email you send.

In Outlook on the web, click Settings (the gear icon), then View All Outlook Settings, then Mail, then Compose and Reply. Scroll to Signatures, click Create New, type your signature, and click Save. On Outlook desktop, go to File, Options, Mail, and Signatures. The process is the same: create a new signature, type your information, and set it as your default.

On your phone, Gmail and Outlook both let you add a signature in the app settings. Open Gmail or Outlook, tap the menu icon (three horizontal lines), go to Settings, find Signatures, and add your text. Phone signatures are usually shorter — many people use just their name — because typing on a small screen is slower.

Inserting an image of your handwritten signature

If you want your electronic signature to look like your actual handwriting, sign a piece of paper with a pen, take a photo or scan it, and insert the image into documents. On a computer, sign a blank page, take a clear photo with your phone or scan it with a scanner, and save the image file to your computer. Then open any document (Word, Google Docs, email), click Insert, select Image, and choose your signature file.

On a phone or tablet, the process is simpler. Open the document or email, tap Insert or the attachment button, select Image, and choose a photo of your signature from your phone's camera roll. If you do not have a photo yet, open your phone's camera app, sign a piece of paper, take a clear photo with good lighting, and save it. Then insert that photo into your document.

This method looks professional and is faster than drawing with a mouse, but it does not create a timestamped record. If you need proof that you signed on a specific date, use a dedicated service instead.

Using DocuSign or Adobe Sign for formal documents

If you need to sign documents that require a legal record — contracts, agreements, or anything you might need to reference later — use DocuSign or Adobe Sign. Both services create a timestamped record showing that you signed the document, when you signed it, and from what device. This record is legally valid in most places and can be important if there is ever a dispute about whether you actually signed something.

To use DocuSign, go to docusign.com, click Sign, and upload the document you want to sign. You can type your name, draw your signature with your mouse or finger, or upload an image of your signature. DocuSign then sends you a confirmation email with a copy of the signed document. The free version lets you sign a few documents per month; paid plans unlock more features like sending documents to others for them to sign.

Adobe Sign works similarly. Go to adobe.com/sign, upload your document, add your signature the same way (typed, drawn, or image), and Adobe sends you a confirmation. Adobe Sign is included free with an Adobe Creative Cloud subscription, or you can pay per document if you do not have a subscription.

Both services also let you send documents to other people for them to sign. This is useful for contracts, agreements, or any document that needs signatures from multiple people. The service tracks who signed, when they signed, and in what order — all recorded in a way that holds up legally.

Signing PDF documents on your computer

If someone sends you a PDF to sign, you have several options depending on what software you have. If you have Adobe Acrobat (the paid version, not the free Reader), open the PDF, click Fill & Sign, and draw or type your signature. Adobe Acrobat saves the signed PDF and can send it back to the person who requested it.

If you do not have Acrobat, you can still sign a PDF by converting it to a Word document, adding your signature there, and saving it as a PDF again. Open the PDF in Word (File, Open, select the PDF), add your signature using Word's Insert Signature Line tool, and save the file. The result is a signed PDF that you can email back.

On a Mac, you can sign a PDF without any extra software. Open the PDF in Preview, click the Markup toolbar button (looks like a pen in a circle), select Signature, and draw your signature. Preview saves the signed PDF automatically.

Signing documents on your phone or tablet

Most phones and tablets can sign documents using the built-in tools or free apps. On an iPhone or iPad, open a PDF in the Files app or Mail app, tap Markup (the pen icon), select Signature, and draw your signature with your finger. The device saves the signed document automatically.

On Android, open the document in Google Drive or Google Docs, tap the pencil icon to edit, then Insert, Drawing, Create New. Draw your signature with your finger and tap Save. If you are signing a PDF, use the free app Adobe Acrobat Reader (available on both iPhone and Android), open the PDF, tap the pencil icon, and draw your signature.

For formal documents that need a timestamped record, download the DocuSign or Adobe Sign app on your phone. Both apps let you upload a document, sign it with your finger, and receive a confirmation email with a legally valid signed copy.

Frequently Asked Questions

Is an electronic signature legally valid?

Yes, for most documents. Electronic signatures are legally valid for contracts, agreements, forms, and business documents in the United States and most other countries. A few exceptions exist: wills, real estate deeds, and some government documents may still require a handwritten signature. If you are unsure whether a specific document needs a handwritten signature, contact the person or organization requesting it.

What is the difference between a simple signature and one from DocuSign or Adobe Sign?

A simple signature (typed, drawn, or an image) is just your name or mark on a document. DocuSign and Adobe Sign add a timestamp and a record showing that you signed on a specific date and time from a specific device. This record is legally stronger if there is ever a question about whether you actually signed the document. Use the simple method for informal documents and the formal services for contracts or important agreements.

Can I use the same electronic signature on every document?

Yes. Once you create a signature — whether by drawing it, typing your name, or uploading an image — you can reuse it on as many documents as you want. Save your signature image or create it in a tool like Gmail or Word so you can insert it quickly each time you need it.

What if I need to sign a document but do not have a printer or scanner?

You do not need either one. You can sign documents entirely on your computer or phone without printing or scanning anything. Type your name, draw your signature with your mouse or finger, or take a photo of your handwritten signature and insert the image. All of these methods work without a printer or scanner.

Can someone forge my electronic signature?

A simple typed name or drawn signature can be copied by anyone with access to the document. If you are concerned about forgery, use DocuSign or Adobe Sign instead, which creates a timestamped record that proves you signed it. For very important documents, ask the other party to use a formal signing service so there is a legal record of the signature.