Why passport photos get rejected
Rejections are frustrating because the reason is usually invisible on a phone screen. A photo that looks fine at thumbnail size fails on a measurement of a few millimetres, or on a blur that only shows at print resolution. Here is what actually gets checked, roughly in the order it goes wrong.
Head too large or too small
This is the single most common failure. The head must fall inside the country's chin-to-crown range — 32 to 36 mm for most 35 × 45 mm standards, 29 to 34 mm for the UK, 31 to 36 mm for Canada. Crop by eye and you will usually make the head too big, because a portrait looks better tight and a passport photo is not a portrait. The related failure is vertical placement: the US and India position the face by the eye line measured from the bottom edge, and China and Russia require clear space above the head, at least 7 mm and about 5 mm respectively.
Expression, eyes and angle
Mouth closed, neutral expression, eyes open and clearly visible, head level and facing the camera. A smile that shows teeth fails; so does a squint. ID Photo measures eye openness and the gap between the lips and flags both before you print, warns when the head is tilted more than about 12 degrees, and fails a face turned far enough off-axis that one side is foreshortened. A tilt you cannot see on a phone is obvious once the frame is cropped to the face.
Sharpness, exposure and resolution
Print resolution is where phone photos quietly fail. Cropping to the head throws away most of the pixels, and if what remains prints below 300 DPI the result looks soft on paper even though it looked sharp on screen. ID Photo shows the effective DPI for your crop and warns below 300. It also measures blur directly, flags a frame that is too dark or too bright, and warns when highlights are clipped — a blown-out forehead has no detail left to print.
Background, and other people in the frame
The background must be one even tone in the colour the country asks for, with no shadow, no pattern and no objects. The app measures the variation across the background and warns when it is uneven. It also counts faces: a second person in the frame, even blurred in a doorway behind you, is an automatic problem. And if the top of the head is cut off by the edge of the original photo, nothing can be recovered — the crown position has to be visible for the head height to be real rather than estimated.
Frequently asked questions
What is the most common reason a passport photo is rejected?
Head size outside the allowed range. It is a measurement in millimetres that cannot be judged by eye, and cropping to taste almost always makes the head too large.
Can I smile in a passport photo?
Not with an open mouth or visible teeth. A neutral expression with the mouth closed is the requirement; a very slight closed-lip smile is usually tolerated but a genuine grin is not.
Why was my photo rejected for being blurry when it looks sharp?
Because it is judged at print size. Cropping a phone photo down to a head-sized frame can leave the print below 300 DPI, and softness invisible on a screen becomes obvious on paper.
Do glasses cause rejection?
They can. Glare on the lenses, frames covering the eyes and tinted lenses all fail, and some authorities — Korea among them — ask for photos without glasses at all. Taking them off removes the risk.
Is a shadow on the background really a problem?
Yes, and it is one of the most common rejections. Standing a metre or more in front of the wall usually eliminates it.
How old can the photo be?
Most authorities ask for a photo taken within the last six months, and require a new one if your appearance has changed noticeably. Reusing an old passport photo is a common and avoidable rejection.
Measure the photo before the counter does. ID Photo opens your picture in the browser, measures head height and eye line against the official spec of the country you pick, and lays out a print sheet. The image is processed on your device.
Measure a photo in the browser