Pull a receipt out of your wallet a few months later and the text is often almost gone. Most card terminal and store receipts are printed on thermal paper, and understanding how it works makes storing it much easier.
Why thermal paper fades
Thermal paper has no ink. Its surface is coated with chemicals that change color when heated, and the receipt printer heats only the spots that form the text. That coating keeps reacting to its surroundings after printing.
- Heat: in a car, near a heater or next to a hot drink, the whole slip can darken or the text can blur.
- Light: long exposure to sunlight or indoor lighting makes text fade.
- Friction and pressure: folding and rubbing in a wallet can leave dark scuffs or wear text away.
- Chemicals: plastic sleeves, some plastic folders, adhesive tape, hand sanitizer and lotion can all discolor it.
Keeping originals longer
For receipts you may need on paper, such as for returns or warranty repairs:
- Put them in a paper envelope and keep it somewhere dark and cool, like a drawer.
- Keep printed sides from pressing against each other: slip plain paper between them, or use one envelope per month.
- Avoid plastic sleeves and laminating. Plastics can fade the print, and a laminator's heat turns the whole receipt black.
- If you must use tape, put it on the back edge, never over the print.
- Write the month and contents on the envelope so you can find things later.
Even well-stored thermal paper can fade within a few years, so keep a photo of anything important as well.
The safest backup: a photo on day one
A receipt is never sharper than on the day you get it.
- Photograph it that day and keep it in a Receipts album on your phone.
- When photos build up, use the receipt tool to turn the date, store and total into a table and download it as an Excel file.
- Keep the photos and the spreadsheet in the same folder so you can check the original when a number looks odd.
For photo tips, see How to photograph receipts for better recognition.
Getting fewer paper receipts
- Many stores and banking apps offer digital receipts, which never fade.
- You can decline a printed receipt and rely on your card app's transaction notifications instead.
- Keep paper only for receipts you actually need for your budget or group accounts, and the pile shrinks quickly.
Good to know
- Some thermal paper contains bisphenol compounds. Wash your hands before eating after handling a lot of receipts, and keep them away from small children.
- If you run a business, tax rules may require you to keep records for a set period, and rules for digital copies vary. In the US, the IRS generally recommends keeping supporting records for at least three years after filing. Check the rules that apply to you.
Summary
| Avoid | Do this instead |
|---|---|
| Leaving receipts in a car or sunlight | A dark, cool drawer |
| Plastic sleeves or laminating | Paper envelopes |
| Carrying them in your wallet for months | Photograph, then move to an envelope |
| Sorting them years later | Put them in a spreadsheet weekly |