Scanning a document from your phone, and signing it
The paper is on your desk, the phone is in your hand, and the client is waiting. This takes the document from desk to signature — no printer, no scanner, and nothing for the client to install.
September 18, 2026
Most documents that need signing still start as paper: a printed form, a contract that arrived by post, a declaration signed by hand. The step that holds things up is not the signature but the conversion — turning paper into a file you can work with. On an Android phone that takes under a minute, and most people do it wrong.
A photo is not a scan
A picture of a document stays a picture: skewed, shadowed, heavy, and sometimes unreadable when printed. A scan squares the page, crops it at its own edges, cleans the background and saves a PDF. The difference is not cosmetic — a document sent as a photo looks amateur to a client, and in a dispute it is harder to rely on.
Scanning from the phone, step by step
- Put the page on a dark, plain surface — contrast helps the phone find the edges.
- Open the scanner you already have: in WhatsApp via attach → document → scan, or from your device’s Files app or Google Drive.
- Hold the phone parallel to the page rather than at an angle, and let the frame lock onto the page before capturing.
- Scan page after page into the same file — not a separate file per page.
- Save as PDF, and check the result before sending it.
Four mistakes that send you back for a second scan
- A shadow from your hand or the phone — turn the page, not yourself.
- A creased sheet — a scan corrects perspective, not creases.
- Missing or out-of-order pages — count them before saving, because the signer sees exactly what you sent.
- Saving as an image instead of a PDF — that is what breaks the next step.
Android menus differ between manufacturers and versions, and the scanner may sit somewhere slightly different on your device. What does not change is the result you want: one PDF, square and legible, containing every page.
From scan to signature
Now you have a PDF. Instead of sending it on WhatsApp and asking the client to print, sign and photograph it back — which hands the whole problem to them — send it for signature.
- Upload the PDF you scanned.
- Mark where each party signs and what else they need to fill in.
- Enter the client’s WhatsApp number.
- Send, and watch it get viewed and signed without chasing.
What the client has to do
Tap a link, enter a one-time code, read the document in their own language and sign with a finger. No sign-up, no password, nothing to install — and nothing to print. If they are on an old Android phone with a slow connection it still works; that is the case the process was designed around in the first place.
Why this beats photographing a signature
A page signed by hand and photographed back proves very little: it cannot tell you who signed, when, or what it said when they signed. A document signed through a process keeps the chain — when it was sent, when it was viewed, how the signer’s identity was checked against their phone number, when it was signed and when it was delivered — and is sealed at the end so that any later change shows immediately.
Try it on the document in front of you
Take the page that is waiting right now, scan it, and send it for signature. A free account covers three documents a month with no card — enough to see the difference on a real document.