Signing a Contract Online: What a Signature on a PDF Actually Proves

Printing a contract, signing it, scanning it back and emailing the result is three unnecessary steps and one degraded document. Nobody needs the paper. But “sign it online” covers two quite different things, and knowing which one you are doing matters if the agreement is ever disputed.

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The two kinds of electronic signature

A drawn or typed signature is an image placed on the page. It is a picture of your name on a document — the digital equivalent of signing a printout. What makes it binding is not the image; it is the surrounding evidence that you agreed: the email thread, the fact you sent it back, the conduct that followed.

A cryptographic signature (PAdES, and similar standards) binds the signature to the file’s contents with a certificate. Change one character afterwards and the signature breaks visibly. It proves the document has not changed since signing — which the drawn kind cannot.

Most commercial agreements are signed the first way and are perfectly enforceable. Where the second is genuinely required — some property, court and public-procurement filings, and in jurisdictions with a formal e-signature regime — you need a qualified provider and a certificate, not a drawing tool.

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Signing a PDF here

Sign PDF — upload the contract, see the pages, draw or type your signature, place it where it goes, download the signed file.

• Draw with a mouse, trackpad or finger, or type your name in a handwriting face. Two of the typefaces cover Cyrillic; the tool says so when you type a name the other two cannot render, rather than silently substituting a different font.
• Place the signature on any page and drag it where it belongs. Place it more than once — signature, initials on each page, a date field.
• A Word file works too. It is converted once, and you sign the converted pages, so what you sign is what the other side will open.

No account. What comes back is a normal PDF with your signature on it — the first kind above.

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Before you sign, not after

A signature is the point of no return, and it is the one moment when reading the document is worth thirty seconds. Before you place it:

Upload the contract for a free review. Six scores out of ten with the reasoning for each — clarity, risk protection, enforceability, balance of terms, structure, overall exposure — plus a count of the concrete weaknesses a rewrite would fix. Free, no account.

The score that matters most before signing is Balance of Terms. It is the one that exposes a contract where every obligation runs one way — which is normal in some documents and a problem in most.

If it comes back weak, that is the moment to ask for changes, not after your name is on it.

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Practical things people get wrong

Signing the wrong version. Check the file you are signing is the one with the agreed changes in it. Contracts go through five drafts and the fifth is not always the one attached.

Signing a page with nothing on it. A signature page detached from the document it belongs to proves very little. Make sure the signature sits on, or attached to, the pages with the terms.

Leaving the blanks blank. [DATE], [ADDRESS], [NUMBER OF DAYS] — a placeholder left unfilled at signature is an open term, and open terms get resolved against whoever drafted them badly.

Sending it as a Word file. Convert to PDF first. A .docx carries tracked changes, comments and revision history, and people have sent contracts with the other side’s rejected terms still readable in the markup.

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Keeping the signed copy

A signed contract is the version that matters for as long as the relationship lasts and for years afterwards. If it is going into long-term storage, convert it to PDF/A — the archival format that embeds its own fonts so it still renders correctly when the software that made it is long gone.

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Next step: sign your contract → — free, no account. Or check it first, which takes about half a minute.