Signature for Online Forms: Black Ink, White Paper & Exact Size Rules
How to sign, photograph, and resize your signature for SSC, UPSC, IBPS, and other Indian forms. Black ink on white paper, 140×60 px, and the rejection traps to avoid.
The signature upload rejects more applications than the photo. It has the tightest file-size limits (often 10–20 KB), strict ink and paper rules, and — for exams — your uploaded signature is matched against the one you produce in the exam hall. Here's how to get it right the first time.
The universal rules
- Black ink pen on plain white, unruled paper. Blue ink scans lighter and is flagged as "unclear" by many portals; ruled or coloured paper fails background checks.
- Sign at your natural size — don't write artificially large or small. You'll need to reproduce this signature at document verification.
- Running handwriting, not capitals. Most notifications (UPSC, banking exams) explicitly state that a signature in all capital letters is rejected.
- Consistency matters. Use the same signature that's on your other documents; a mismatch at verification can disqualify you.
How to capture it cleanly
- Sign 2–3 times on the sheet and pick the cleanest one.
- Photograph or scan in bright, even daylight — no shadows across the paper. Hold the phone directly above, parallel to the sheet.
- Crop tightly around the signature, leaving a small white margin on all sides.
- Resize to the form's exact pixel dimensions and compress into the KB range (see table below). The signature tool on each form page does the crop, resize, and compression in one step.
Signature size by form
| Form | Dimensions | File size |
|---|---|---|
| SSC CGL / SSC CHSL | 140 × 60 px | 10–20 KB |
| IBPS PO / SBI PO | 140 × 60 px | 10–20 KB |
| UPSC CSE | 140 × 60 px | 10–40 KB |
| JEE Main / NEET UG / CAT | 140 × 60 px | 4–30 KB |
| PAN Card / Driving License | 140 × 60 px | 4–30 KB |
| GATE | 480 × 160 px | 50–160 KB |
Struggling to get under 20 KB? See how to reduce file size without losing quality. Converting a cm spec to pixels? Use the cm-to-pixels tables.
Why signatures get rejected
- Blue or faint ink — scans as grey and fails the clarity check.
- Shadow or yellow tint across the paper from indoor lighting.
- Signature too small in the frame — crop tighter so the signature fills most of the image.
- Stretched to fit — resizing a square crop into 140×60 distorts the strokes. Crop to roughly 7:3 first, then resize.
- Capitals or printed name instead of a running signature.
Frequently Asked Questions
Q1. Should I sign in blue or black ink for online forms?
Black ink. It scans with the highest contrast on white paper. Several notifications (SSC, UPSC, IBPS) specify black ink explicitly, and blue-ink signatures are the most common "unclear image" rejection.
Q2. What is the standard signature size for Indian government forms?
140 × 60 pixels in JPG format is the most common spec, used by SSC, IBPS, SBI, UPSC, NTA exams, and PAN. File-size limits vary from 4–30 KB (NTA, PAN) to 10–20 KB (SSC, banking).
Q3. Can I type my name or use a digital signature font?
No. Exam and government portals require a handwritten signature image. Typed, stamped, or font-generated signatures are grounds for rejection of the application.
Q4. Does my uploaded signature have to match my exam-day signature?
Yes. At the exam centre and during document verification you sign again, and examiners compare it with the uploaded image. Sign naturally when you capture it — don't produce a one-off decorative version.