When to Target the Higher End of the Range
The real SSC signature range is 10KB to 20KB, and most candidates are safest on the standard SSC signature page, which targets the middle of that range. This page targets the top of it — near 18-20KB — for source scans where compressing further starts to blur fine pen strokes: a lighter-ink signature, a slightly shaky hand, or a phone photo instead of a flatbed scan.
Targeting the upper end trades file size headroom for legibility. It doesn't raise the 20KB ceiling — the portal still enforces it — it just means less detail gets discarded during compression.
When the Extra Headroom Actually Helps
If your source is a bold black-ink signature from a flatbed scan, this makes little visible difference — the standard page's middle-of-range target already compresses it cleanly. It matters more for lighter ink, a phone photo taken at an angle, or a signature with fine detail (like a stylized flourish) that heavier compression tends to smear into an unclear blob.
Signature Rejection Reasons at Any KB Target
Regardless of target size, the same rejections come up: signatures in capital letters (SSC requires normal running handwriting), typed or digitally generated signatures instead of a handwritten scan, and files outside the permitted KB range or wrong format. None of these are fixed by adjusting the KB target.
FAQ
Only if your source scan is faint or shaky. A bold black-ink signature compresses well below 20KB on the standard page without visible quality loss.
At 140×60 pixels, 20KB is enough for a clear signature as long as the source scan itself is legible. Start with a clean scan for best results.
No. SSC instructions say the signature should not be in capital letters. Use normal running handwriting.
Lower the target slider a few KB below 20, since some portals reject files at the exact boundary rather than strictly under it.
Similar Tools You May Need
For the full upload checklist, mobile workflow tips, and troubleshooting guide, see the standard SSC signature resize page — the process is identical once the file is compressed to your target size.