How to sign ugly scanned PDFs from banks and government portals

The Real World Is Messy

PDF signing demos always show pristine, perfectly formatted digital documents. In reality, most of the documents you need to sign look like they were photocopied in 1997. Bank forms that were scanned sideways. Government portals that export forms as low-resolution images embedded in PDFs. Lease agreements where the landlord's stamp covers half the signature line. Tax forms where the fields don't align with the text. These are the documents that break most signing apps. The AI can't find the fields because there are no proper field metadata. The text is an image, not selectable text. The document is basically a photo pretending to be a PDF.

How eSign PDF Handles the Ugly Stuff

eSign PDF's AI field detection uses two approaches. For clean digital PDFs with proper form metadata, it reads the field structure and highlights signature, date, and text fields automatically. That's the easy case. For scanned PDFs (the messy ones from banks and government), it falls back to visual detection using Apple's Vision API. It's looking for signature lines, 'Sign Here' text, date fields, checkboxes, anything that visually looks like a fillable area. It's not perfect on every ugly scan, but it handles most of what gets thrown at it. And when AI misses a field, you just tap anywhere and place your signature manually. The fallback is intentional. Reliable manual placement beats AI that guesses wrong and puts your signature on the wrong line.

How to do it

Mistakes to avoid

• 1Expecting AI to be perfect on scanned documents. No AI handles every scan perfectly. That's why manual placement exists as an equal, not inferior, fallback.
• 2Trying to sign government PDFs in Apple Markup. Markup can't handle the multi-page forms most government documents use. Signatures on pages 2+ often vanish.
• 3Not checking the final export. Always preview the flattened PDF before sending. Make sure your signature landed on the right line, especially on messy scans.
• 4Re-scanning a scanned PDF. If you received a scanned PDF, don't scan a printout of it. That's a scan of a scan. Just sign the original file digitally.
• 5Using a browser tool for sensitive government forms. Your tax form or bank application contains personal information. Use an on-device app, not a browser tool that might upload it.

Built for Real Documents, Not Demo PDFs

eSign PDF was stress-tested on the ugliest documents we could find: crooked bank scans, low-res government forms, stamped-over lease agreements. AI helps when it can. Manual placement works when it can't. The result is a signed, flattened, tamper-proof PDF regardless of how messy the original was.

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