How do I cancel payments or issue refunds?

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Canceling card payments or making refunds is easy— you can do so via API or you can look up the charge in your account statement and cancel or issue the refund there. 

Refunds can be whole or partial (any amount up to the original amount of the charge). 

When you refund a charge, the fees you paid to process the charge are also returned to you. That is, after charging and then completely refunding a payment, the net cost is zero. If you partially refund a charge, we refund the pro-rated portion of the percentage cost. For example, if you refund €50 of a €100 transaction, we refund €1 of €2. A simple way to think about this is that after charging and then partially refunding a payment, the net cost to you is the same as if you’d charged that amount in the first place.