How to scan a CNIC with both sides on one page
Photograph the front, photograph the back, and place them on one A4 sheet at 85.6 × 54 mm — the real card size. Printed at 100%, the copy measures the same as the card, which is what an office checking it expects.
The ID card tool does the layout for you, in your browser. ID card scan
Why one page, and why the size matters
Offices ask for both sides on one sheet because it is one document to file rather than two to lose. They care about size because a card blown up to half a page is hard to check against the original, and a card shrunk to a stamp is unreadable. ID-1 — 85.6 by 54 mm — is the size a CNIC, a driving licence, a passport card and a bank card all share.
The four reasons a card copy gets rejected
Glare across the number, from a flash or a plastic sleeve. A shadow across the photograph. The card cropped so tightly the edge is cut. And the two sides at visibly different sizes, which happens when they are photographed from different distances and no layout step fixes it.
Take it out of the sleeve
This is the single biggest improvement available. Plastic over plastic reflects whatever is above you straight into the camera, and a blown-out highlight cannot be recovered by any amount of processing — the detail is simply not in the file.
A note on where the photographs go
An identity document is not an ordinary file. On a tool that works client-side, the photographs are processed in the page and never sent anywhere. Even so, on a shared or public computer they sit in that machine's memory and downloads folder while you work — use your own device.