There are two separate questions here: “Can I make this image?” and “Will the authority accept it?” Good preparation answers the first without pretending to control the second.
Start with the least invasive fix
If the file size is wrong, compress it; if the crop is wrong, recrop it. Retake the portrait only when the source itself cannot meet the requirement.
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.
Do the visual check last
After all numeric settings are correct, look at the portrait without the form around it. A clear face, clean background and natural appearance should still be visible at full size.
One phrase, several real outputs
“Passport size” is a category label, not a universal technical specification. Country and application route can change the physical frame, face measurement and digital upload limits.
The practical workflow is to keep the camera original as a master and create the application version only after the destination has been identified.
The part worth saving
Keep the working files separate: original capture, clean master and application-ready copy. Naming those three versions prevents accidental reuse of a compressed or incorrectly sized file.
Why Passport Photos Look Different After Upload
FastIDPhoto is useful when you need to turn one good portrait into a measured file or print sheet for a particular application.