From the first question to reviewer follow-up
Identify the required rate type
Start with the customs rule, VAT method, authority instruction, or professional advice governing the file. Some procedures call for a specific official reference rate; others require a transaction rate or another authority's publication.
Keep the official source and selected date
When the calculation uses a supported official reference rate, record the institution, dataset, and date selected for the file. Keep the reason for that choice with the declaration or workpaper.
Preserve the evidence with the calculation
Attach the Signed FXProof Proof PDF to the invoice file, declaration, calculation, or VAT workpaper that used the rate. Keep the transaction details and procedure-specific explanation in the business file.
- Source name and source date.
- Rate context used in the customs or VAT file.
- Embedded digital signature.
- Document id and payload hash shown in the PDF for public verification.
Know when a different authority or bank record is required
FXProof does not replace a customs authority publication outside its supported source catalog, or a bank record showing the rate applied to a real payment. Use the evidence required by the procedure in front of you.
Give a reviewer a document they can check
A reviewer can inspect the source and rate context, digital signature, document id, and payload hash without access to your account. Your team remains responsible for the applicable source, date, customs or VAT rule, and filing context. FXProof does not guarantee acceptance.
Import/export file
Keep exchange-rate proof with the calculation or declaration that used the rate.
View a proof sampleHMRC file context
Use HMRC guidance when the file already calls for an HMRC dataset, date, or period.
Open HMRC source pageECB VAT or OSS context
Use ECB guidance when the file already calls for an ECB reference rate and selected date.
Open ECB source pageBank or official rate?
Check whether the file asks for the actual bank conversion or an official reference-rate record.
Compare bank and official ratesQuestions
What proof do I need for the exchange rate used on an invoice?
Attach the Signed FXProof Proof PDF to the invoice or transaction file that used the rate. Its FXProof proof and verification fields are already inside the document.
How do I document the exchange rate used for a declaration?
Keep the signed proof PDF with the declaration or calculation. Your team remains responsible for the applicable source, date, rule, and filing context.
Does FXProof decide which customs or VAT source to use?
No. FXProof documents supported source/date/rate evidence. Your team remains responsible for source selection and procedural requirements.