Applies to: Readable capture and retrieval, not tax or legal advice about retaining or discarding originals.
Scan receipts promptly at about 300 DPI in grayscale or color, keep the full edges visible, verify the date and total, and use a filename that connects the image to your record system. Retain originals when tax, legal, or organizational rules require them.
Thermal paper can fade
Many receipts are printed on heat-sensitive paper that can fade, darken, or react to storage conditions. Digitizing early preserves a useful visual copy, but it does not automatically satisfy tax, warranty, accounting, or legal retention requirements.
Check the rules that apply to the specific record before discarding the paper original.
Capture difficult details deliberately
Use grayscale when black printing is faint or the paper is discolored. Use color when colored stamps, handwriting, highlights, or paper markings carry meaning. Avoid pure black-and-white mode if it erases light characters.
- Flatten the receipt without covering an edge.
- Place a dark, plain backing behind translucent paper if it improves edge detection.
- Scan at about 300 DPI in grayscale or color.
- Keep the merchant, date, items, tax, total, and payment reference visible.
- Review the image at normal size and zoom in on faint totals.
- Rescan immediately if critical characters are missing.
Use filenames and folders that support retrieval
A file named scan001.pdf is difficult to match later. A consistent pattern such as 2026-08-27_vendor_amount can make manual retrieval easier. Avoid putting sensitive account numbers in filenames that may appear in shared folders or backups.
If an expense system assigns its own record ID, include that ID according to organizational policy.
Verify OCR but keep the image
OCR can make receipts searchable, but small thermal text, columns, currency symbols, and decimal points are difficult recognition targets. Compare extracted merchant, date, tax, and total values against the visible image.
Keep the page image as evidence of what was captured. Do not rely only on extracted text or an automatically populated expense form.
Verify the record without putting sensitive values in the filename
For a fictional receipt, use a filename such as 2026-09-04_stationery_demo.pdf, then keep the transaction identifier in the approved records system. Check the merchant, date, currency, tax and total against the image. An OCR total that omits a decimal point can be plausible enough to escape a casual review.
Include all edges and any continuation on the back. If thermal text is already fading, retain the first successful capture and avoid heat-based attempts to restore it. A legible digital copy does not by itself settle whether the original must be retained.
Sources and further reading
Vendor instructions and background references are linked below. Worked examples are our explanatory calculations, not vendor performance claims. Check the instructions for your current software and device.
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