More e-visas die on the photo than on any other single item. The rules are fussy because software reads the photo before a human ever sees it.

E-Visa Photo Requirements: The Silent Rejection Machine
Image via Wikimedia Commons

- White or light background, no shadows on the wall behind you. - No glasses, no hats, neutral expression, mouth closed. - Taken within the last 6 months. That 2019 photo will not pass. - Vietnam: 4x6 cm. India: square JPEG, 10 KB to 1 MB. Turkey: standard passport photo scan. - No selfies with filters, no cropped group photos, no screenshots of another photo. Sources: U.S. State Department, Indian Visa Online The fix is boring and works: stand against a white wall in daylight, have someone else take it, and check the file size before uploading. If your application offers a photo compliance preview, use it. A two-minute photo check beats a five-day rejection and a second non-refundable fee.

ETA photo requirements are strict and silently enforced; a photo compliance checker catches rejections early.