Two formats, one underlying photo
Most document-photo workflows accept either a digital file or a physical print, but rarely both in the same channel. The portrait inside is identical - same crop, same background, same expression - but the specification describing it changes shape depending on the surface. A digital submission talks in pixels, file size, and colour profile. A printed submission talks in millimetres, paper finish, and ink. Understanding which dialect your application speaks is the first step to a clean approval.
Where digital uploads dominate
Online renewals, e-visa portals, and lottery-style applications such as the US Diversity Visa programme are digital-only. They expect a JPEG sized in pixels - 600 by 600 is common in the US, 35 by 45 millimetre at 300 DPI converted to pixels is common in Europe - and they will reject anything outside a tight file-size window. The DV programme caps uploads at 240 KB, several visa portals cap at 1 or 2 MB, and a small number of Asian portals still expect under 100 KB. Compression matters as much as resolution at the lower end of that range.
Where prints still dominate
In-person passport submissions, US passport applications mailed with paper forms, many North American driving licence renewals, and most consular visa appointments still require a physical print. Print specifications are dimensional: 2 by 2 inches in the US, 35 by 45 millimetres across most of Europe and Asia, 50 by 70 millimetres for a handful of national IDs. Paper finish - matte versus glossy - is sometimes specified, with matte slightly more common for biometric machine reads to avoid glare.
Going from digital to print without losing compliance
The safe path is to start with a digital file that already meets the pixel and geometry specification, then print it at the correct physical size. A 600 by 600 pixel file at 300 DPI renders as 2 by 2 inches, which is why that pairing is standard for the US. For a 35 by 45 millimetre European print you want roughly 413 by 531 pixels at 300 DPI, or a higher pixel count downsampled at print time. Print on photo paper rather than home office paper - uncoated stock dulls the skin tones enough to trigger a rejection on quality grounds.
When both are needed
A few workflows want both. Some US passport applications submitted in person still want a printed photo even though the renewal can be done digitally. Schengen visa appointments often want a printed photo at the appointment plus a digital copy uploaded to the visa portal beforehand. In those cases, produce the photo once at the highest fidelity, derive the print from the digital master, and keep both versions until the application is approved.
Common rejection patterns specific to each format
Digital photos get rejected for compression artefacts, oversampling from a low-resolution capture, and wrong colour profile (sRGB is the safe choice). Prints get rejected for paper finish, ink smudging, dimensional errors of even a millimetre or two, and visible cut lines from cheap kiosk printers. Knowing which class of error your channel is sensitive to lets you head off the rejection before submission.