Why did my client see a card fee?

If you enabled fee passthrough, the card processing fee is added at checkout and itemized on the receipt, so your quoted price is what you keep.

You can absorb the fee instead under MeloPay → Fees. Bank transfers cost less either way; clients see both options.

There is no universally right setting — passthrough keeps your quote honest to your margin, absorbing keeps the checkout number identical to the quote. Whichever you pick, the receipt itemizes it, so the client is never surprised by a number they cannot trace.