0 items
How?
Add the exact original files for this part of the record. Keep them unchanged; a different export or edit has a different fingerprint.
Add link and screenshots
The link is recorded, not fetched or verified.
Finance
Keep readable receipt originals with a date you can check.
Keep readable receipt originals with a date you can check. Keep your original source records together, then date the exact files. It does not prove a purchase occurred, establish business purpose or tax treatment, or set a retention period.
Your photos and files stay on your device, so keep them.
EXAMPLE
Receipt archive
1 Nov 2026
Authority time: 14:02 UTC · example
Bitcoin block time: 14:10 UTC · example
Last checked: 15:02 UTC · example
Bitcoin block time: 14:10 UTC · example
Last checked: 15:02 UTC · example
✓ Dated◆ Permanent
Now keep it safe: three things
- Keep your photos and files unedited. The receipt only matches the originals. Put them in an album such as “My records”.
- Save this receipt to your camera roll.
Keep the receipt file too. The image is a handy copy; checking needs the file.
- Email it to yourself.Email it to myself
Your mail app opens a draft. Attach your receipt image and receipt file. Don’t attach your photos or documents. Timevolt does not send it or know whether it was sent.
Your record, one step at a time.
Your photos and files stay on your device, so keep them.
Local preview: files are fingerprinted here. Notes and progress stay in this browser. Keep downloaded copies; browser storage is not a backup.
0 items
How?
Record the date, time, place and who you spoke to. New notes are saved separately rather than editing an old note.
How to keep notes that hold upWrite it down
By making a receipt you agree to the Terms and Privacy Policy. The Bitcoin record is permanent.
By making a receipt you agree to the Terms and Privacy Policy. The Bitcoin record is permanent.
How to keep notes that hold up
Write notes as soon as you can. Keep the original account rather than replacing it later; the venue decides what weight it gets.
- Write it down straight away, on paper or in the box on a step.
- Put the date, time and place at the top, and who you spoke to.
- Use their words where you can; separate what you saw from what you were told.
- Sign or initial a paper note, photograph it and add the photo.
- Never edit an old note. Add a new dated entry when something changes. A device save time is not independent time evidence or proof of event order.
Receipt archive
Receipt archive
01 · Keep the exact files
Keep the original files for receipt archive. Include any existing photos, signed records and source-system exports.
Records to keep: Receipts
Receipt archive
02 · Date the file’s code
Your device fingerprints the selected file or manifest. Dated follows an independent timestamp; Permanent follows Bitcoin anchoring.
An independent time, tied to the exact bytes.
Receipt archive
03 · Keep the evidence
Keep the original files and complete receipt separately, alongside any existing venue, signature and workflow records.
Keep the originals too. A changed or compressed copy has a different fingerprint.
Try a file. It stays here.
Make a test receipt on this device.
By making a receipt you agree to the Terms and Privacy Policy. The Bitcoin record is permanent.
or drop a file here
Real cases: why the saved copy matters.
Real cases where dated records mattered. We don’t claim a time receipt would have changed the result.
US Tax Court · 2022
Save readable receipts with the work purpose
A taxpayer used receipts to support meal costs. Some could not be read, and others did not show the work purpose. The court rejected the meal claims but allowed some other costs that had proof.
Summarized on Oct 29, 2026
Read the source ›US Oregon · 2023
Different expense records can yield different results
Taxpayers disputed work costs and income with the tax office. Some logs and receipts did not give enough detail. The court kept some tax changes but rejected a separate claim that income should be raised.
Summarized on Oct 29, 2026
Read the source ›US Second Circuit · 1969
Private codes are weak expense proof
A taxpayer used coded calendar notes to support meal costs. No receipts or other evidence backed the private codes. The court found too little detail and kept the claims rejected.
Summarized on Oct 29, 2026
Read the source ›What courts, schemes and regulators say.
Positions below refer to the cited rule or record type, not endorsement of Timevolt. This service is not represented as an eIDAS qualified timestamp provider. A non-qualified timestamp does not receive the qualified timestamp presumption.
Internal Revenue Service
Business recordkeeping guidance
Records support the amounts and matters reported, and retention depends on the underlying event and circumstances. A file timestamp does not prove deductible purpose or permit disposal.
Source summary as of 2026-10-28. Check the current source and applicable local rules.
Read the sourceAustralian Taxation Office
Digital storage of paper records
ATO guidance accepts true clear reproductions meeting its recordkeeping rules. This concerns digital images, not approval of Timevolt or of a tax claim.
Source summary as of 2026-10-28. Check the current source and applicable local rules.
Read the sourceOther ways to do this
Prices change. Check each provider’s site for current prices and service details.
Related workflows.
Proves / Doesn’t prove
Proves
A completed time receipt shows that the exact selected file existed by the independently witnessed time. You can check whether a later copy has the same bytes. It does not establish creation time, authorship, identity, event order, location or the truth of the contents.
Doesn’t prove
It does not prove a purchase occurred, establish business purpose or tax treatment, or set a retention period.
It does not prove a purchase occurred, establish business purpose or tax treatment, or set a retention period.
These are the bounds of a completed proof. The local tester does not establish any time. The chosen court, scheme or regulator decides what to accept.
Questions, answered plainly.
Your file stays on your device. During normal receipt creation, your device sends a randomized code made from its fingerprint, plus encrypted recovery data. It doesn't send the plain fingerprint or the random value that opens the code. Keep the original file and the complete receipt for checking. Privacy Policy.
Can I keep a photograph of a paper receipt?
ATO guidance accepts clear faithful digital copies meeting its rules; the image must retain readable information.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerDoes OCR text replace the receipt image?
Keep the actual receipt record. The ATO distinguishes entering extracted details from retaining the underlying document.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerDoes a time receipt prove a purchase?
A completed time receipt shows that the exact selected file existed by the independently witnessed time. You can check whether a later copy has the same bytes. It does not establish creation time, authorship, identity, event order, location or the truth of the contents.
How long should I keep receipts?
The relevant authority and the purpose of the record determine that. The IRS says retention depends on the action, expense or event.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerWhat should I check before archiving?
Check the supplier, transaction date and other necessary details are readable, and keep the original image alongside any extracted fields.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerThe file tester runs on your device. It does not issue a timestamp or take a payment.
Keep the records you already have.
Keep your original files and any existing official records while the receipt service is being prepared.