Sign in black ink on plain white paper, scan or photograph it in good light, crop close around the signature and resize it to the pixel size and KB range in your notice. The most common mistakes are signing in capital letters, a grey or shadowed background, and a tiny signature inside a big white area.
What the notices ask for
| Exam (notice) | Size | KB | Special rule |
|---|---|---|---|
| SSC CGL 2026 | about 6.0 × 2.0 cm (para 9.6) or about 4.0 × 2.0 cm (Annexure-IV) | 10–20 | Blurred or miniature signatures are rejected |
| RRB NTPC (CEN 06/2026) | at least 140 × 60 px at 100 DPI or more | 30–49 | Black ink, running handwriting, not capitals |
| IBPS PO 2026 | 140 × 60 px (preferred) | 10–20 | Not in CAPITAL LETTERS |
| UPSC CSE 2026 | 350–500 px (check the portal) | 20–100 | Sign 3 times, one below the other, scanned as one image |
| India Post GDS 2026 | 300 × 120 px (recommended) | 20–100 | Signature fills 70–80% of the image; no typed or digital signature |
Some forms need two signatures. Bihar Police Constable (Advt 02/2026) asks for one in English and one in Hindi, as separate files. Rules differ a lot, so read your own notice.
Sign it properly
- Use plain white, unlined paper and a black pen. Some notices also allow blue, but RRB asks for black.
- Sign the way you will sign at the exam centre. Your signature can be compared later, so do not make a special version for the form.
- Write in running hand, not in capital letters.
- Sign at your normal size, as you would on a document. A very small signature turns blurred once it is cropped and enlarged.
- Sign a few times and pick the cleanest one.
Scan or photograph it
- A scanner gives the cleanest result. With a phone, take the picture in daylight near a window, holding the phone flat above the paper so the signature is not slanted.
- Keep the shadow of your hand or phone off the page.
- Turn off filters and beauty modes, and use the original file, not one sent through a chat app.
Crop, clean and resize
- Crop close around the signature with a small margin, so it fills most of the image.
- Make the paper pure white and the ink dark. A non-white background is one of the reasons RRB gives for rejection.
- Resize to the width and height in your notice. A signature image is wider than it is tall.
- Save as JPG within the KB range, and check that the strokes are still sharp.
What to do next
The signature resizer crops, can whiten the paper and fits the KB range for your exam. Check the result with the file checker, and see every exam's sizes on photo and signature size.