Most photo problems are easier to prevent than to repair. The capture conditions matter long before the crop is opened in an editor.
Treat the error as a clue
Write down the exact rejection message. Then test one variable at a time: file format, file size, dimensions, crop, background and image quality.
Keep a copy of the version that failed
When troubleshooting, do not overwrite the previous file immediately. A simple filename such as passport-original.jpg, passport-size-fixed.jpg and passport-upload-version.jpg makes the workflow auditable and prevents accidental loss of the original.
Think like the receiving system
Ask what the next screen will validate: dimensions, file type, size, composition or image quality. Preparing specifically for those checks is safer than trusting a generic document-photo preset.
A passport photo is an application-specific deliverable
The same face can legitimately need several outputs: one physical print, one square digital image, or a country-specific frame. The portrait is reusable; the final file is not necessarily interchangeable.
Keep the original portrait separate so each version can be prepared without degrading the master.
What to remember from this page
When you finish, record the authority or form beside the output. That turns a generic image file into a traceable application asset and reduces mix-ups between similar document photos.
20 Common Passport Photo Rejection Reasons
Once you know the current size and file rules, the Studio can handle the crop, background and output preparation.