Verify a LangHub Invoice
Scan the QR code printed on your invoice and we will instantly show you a verified copy of its details exactly as recorded by the LangHub server at payment time — verification works only through the signed link inside the code.
🔒 Verification is available exclusively through the QR code printed on the invoice — invoice details can never be looked up by number alone, protecting subscriber privacy.
How does verification work?
- Every invoice is issued exclusively by LangHub servers once a payment is actually completed — no one, including app users, has any path to issue an invoice outside the server.
- Each invoice is digitally signed (HMAC-SHA256) with a key that exists only on the server, so any manual tampering with its data invalidates the signature and is exposed by this check.
- Invoice details are reachable only through the invoice's signed link printed inside its QR code — the number alone (or a URL with a modified number) reveals nothing, because the signature is generated with a key that exists only on the server.