Start with the moment of submission. What will the form ask you to upload or hand over, and what exact checks can fail? Work backwards from those answers.
Design the output around the paper
For physical photos, the paper is the canvas. Decide the finished photo dimensions, number of copies, spacing and safe margins before exporting the sheet. Then make sure the print dialogue does not rescale the page.
A small test prevents a large reprint
Measure one printed copy after the first run. If it is larger or smaller than intended, stop and correct the scale setting before printing the entire sheet. “Fit to page” is convenient for ordinary documents but can change the physical size of an ID photograph.
If something still looks wrong
Return to the original source instead of piling more edits onto the current export. Most document-photo problems are easier to solve upstream than at the end of a compression chain.
The physical result deserves its own quality check
When the final output is a print sheet, check one physical copy rather than trusting the preview alone. A printer can introduce scaling, border expansion or colour shifts that are invisible in the exported PDF or JPEG. A small ruler or a known reference measurement can confirm the actual dimensions before you produce the full batch.
Practical detail to carry forward
If this is a repeated task, write the destination into your notes next to the final dimensions. A small record is surprisingly useful when the same person later needs another application photo.
How to Print Passport Photos at a Local Shop
FastIDPhoto can prepare a clean output while you keep control of the original portrait and application destination.