How can I do a partial refund on ping

Hello Sarah. If you can't do something on the app, the easy answer is to do it on desktop instead. 

Kia Ora Sarah,

Ping refunds have to be made through the Desktop site, the Apps don't have this setup as yet. If you are using one of the Apps type TradeMe.co.nz in your device Browser to pick up the Desktop site.

Select 'My TradeMe' > scroll down to 'My Balances' & select 'Manage Ping' > under the 'All Transactions' you click on the one you're refunding > select the 'Refund' Tab & enter the amount of the partial refund. - Ping & Success fees you were charged for the full amount are adjusted accordingly & the overpaid balance is automatically repaid back into your account. - Cheers.

Can I do this if I just want to refund a courier charge if they have paid by Ping?  I don't want to select refund and have it pay back the entire amount as there is no way to indicate what happens when you select that option.

Kia ora DLS, yes, it's easy to do a partial refund when the buyer pays by Ping. When you go to refund you just enter in the amount you want to refund and let your buyer know you've done it.