Passport and government ID photos get rejected more often for technical formatting issues than for how the photo actually looks, a shadow behind the head, a background that isn't quite plain enough, or dimensions slightly off spec are the most common reasons an otherwise good photo bounces back. Knowing the actual rules being checked makes it possible to get this right without a studio visit.
The background requirement is stricter than it sounds
Most passport and ID photo rules require a plain, uniformly lit background, typically white or light gray, with no texture, pattern, shadow, or gradient visible behind the subject. A shadow cast on a wall behind the person, even a subtle one, is a common rejection reason, since it reads as a non-uniform background to the automated or manual review process. If a genuinely plain wall isn't available for the original photo, Change Image Background can replace whatever's behind the subject with a clean, compliant solid color after the fact, provided the subject was well-lit and clearly separated from the original background to begin with.
Size, head position, and framing rules
Beyond background, most requirements specify an exact photo size (for example, 2x2 inches or 35x45mm depending on the country), a head that occupies a defined percentage of the frame height, and centered, forward-facing framing with the eyes at a specified vertical position. These numbers vary meaningfully by country and document type, a US passport photo spec differs from a Schengen visa photo spec, so it's worth confirming the exact current requirement for the specific document before finalizing. Passport Photo Maker builds in common country presets and handles the cropping and sizing math directly rather than requiring manual measurement.
Lighting and expression details that cause rejections
Even, front-facing lighting with no harsh shadows across the face, no glare on glasses, and a neutral expression with both eyes open are standard requirements across most countries' rules. Photos taken with a phone's front camera in a dim room commonly fail on lighting alone, standing facing a window or other soft, even light source solves most of this without needing photography equipment. If glare on glasses is unavoidable in the source photo, retaking the shot without glasses (where the rules allow it) is usually more reliable than trying to edit glare out afterward.