How to sign a Word document electronically

Word documents and e-signatures have always had an awkward relationship. Word has signature functionality built in, but it's worth understanding exactly what each option does before you commit to one. The three options are very different in what they produce.

Option 1: the Draw tab

In Word for Microsoft 365, go to the Draw tab and use your mouse, trackpad, or touchscreen to draw your signature. You can then move and resize it like any other image element. This embeds a signature image in the document. It's not cryptographically linked to the file, and it leaves no audit trail. Use this for internal approvals and informal sign-offs — not contracts.

Option 2: Insert > Signature Line

Word's built-in signature line (Insert > Signature Line) creates a visible signing box. When the recipient opens the document and signs via the Microsoft signature flow, it can use a digital certificate to verify their identity. This is a qualified digital signature — technically strong. The catch: it requires all parties to have compatible digital certificate software, which is unusual outside enterprise IT environments. Most small businesses and individual clients won't have this set up.

Option 3: convert to PDF, then sign (recommended)

This is what most businesses actually do in practice. Draft in Word, export as PDF, sign the PDF through an e-sign tool. The workflow is clean: Word is for editing; PDF is for signing. Once a document is signed, it shouldn't be editable anyway.

• Finish your draft in Word
• File > Save As > PDF (or File > Export > Create PDF/XPS)
• Upload the PDF to InkRobin or your e-sign tool of choice
• Add signature fields, then sign or send for signing
• Keep the signed PDF as the definitive record

Which option is legally valid?

All three can technically satisfy ESIGN and UETA — intent to sign is all that's legally required. The question is what evidence you'd have if the signature were challenged. A drawn image in Word: very little. Word's certificate-based digital signature: strong, but rarely practical. A PDF signed through an e-sign platform with a full audit trail (email, IP, timestamp, document hash): the recognised standard that courts and counterparties expect.

What about Google Docs?

Google Docs has a built-in signature feature under Insert > Signature that works like Word's Draw option — it embeds a signature image. Google Workspace subscribers get a more robust request-a-signature feature that generates a PDF with an audit trail. For most users, the cleanest workflow is still: export to PDF, sign with a dedicated e-sign tool.