Private signing prototypeSpecial Power of AttorneyLocal session

Sami Ullah · witness signing

Review, sign, then capture your thumbprint.

This prototype guides capture from the phone’s rear camera. It analyses the live camera feed; it does not accept a normal photo upload as the primary path.

Step 1

Review the document

Open full PDF

Read the full Special Power of Attorney before continuing. The final signing service will make the document and its hash immutable before each signer acts.

Step 2

Add your signature

Draw your usual signature.

Step 3

Capture a clear right-thumb ridge image

Show the whole front fingerprint pad inside the oval, with its tip and sides visible. Start about 15–25 cm away and adjust the distance to fit. Capture happens automatically when more than 90% of the guide has clear ridge detail.

Keep the thumb facing the camera. Tilt it just a few degrees left or right to improve the light and ridge visibility, then pause. Keep the same front view throughout.

Live ridge patch
Camera is off
Light
Focus
Ridge coverage · >90%
Motion

Start the camera when you are ready. Frames remain in this browser and are never uploaded by this prototype.

Camera diagnostics

The log contains numerical measurements only. If needed, you can explicitly save the most recently rejected patch to your own phone; it is never uploaded automatically.

Start the camera to record diagnostics.

Step 4

Review & finalise

The final implementation will place approved fields into the PDF, generate a document hash and signer audit record, then lock the completed copy. This local prototype deliberately does not transmit or finalise a legal document.

Complete the signature and guided capture first.