Start with the best scan you can make
If you still have the physical print, scan it flat at a useful optical resolution and clean dust from the scanner glass first. A direct scan preserves more tonal information than a phone photograph taken through glare or perspective. Save an unedited master before cropping, denoising, or upscaling so you always have a trustworthy reference.
When only a compressed message attachment is available, use that file, but set expectations accordingly. Upscaling can improve readability and output dimensions; it cannot recover evidence that was never captured. Avoid repeatedly saving the source as JPEG because every generation can add blocking and ringing around faces or high-contrast edges.
- Use a direct scan instead of a screenshot when possible
- Keep one untouched master file
- Crop borders only after preserving the full source

