NEET signature, 10–100 KB
Sign in blue or black ink on white paper and crop to a wide strip. Do not upload the portrait here.
The photo and the signature are different files on the NTA form.
What usually goes wrong
A signature that is a speck in the corner fails the same way SSC describes for miniature signatures.
What this page checks
JPEG between 10 KB and 100 KB, starting at 350×150 pixels. Confirm the bulletin if it prints a different box.