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Crypto payment

What happens if I underpay or overpay an invoice?

Short answer

Shortfalls up to 3% are accepted automatically and the order provisions normally — this covers wallets that deduct the network fee from the sent amount. Larger shortfalls are held; you can top up against the same invoice or request a refund. Overpayments are refunded to an address you nominate.

The most common cause of an underpayment is a wallet that subtracts the miner fee from the amount rather than adding it. Send the exact figure shown and let the wallet add the fee on top.

If an invoice expires with a partial payment against it, nothing is lost. Contact support with the transaction hash and we will either credit it to a new invoice or refund it.

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