Click on 'Account Summary' in the left menu section of My Booth. In the ensuing screen click on 'Sale payment by me'. The upcoming screen will display all sale payments done by you. Click on 'Delivered' against the payment row.
How to change swap/wish delivered status
Click on ' MY BOOTH ' in the top menu section. Click on 'more' icon under the 'my offers'. The upcoming screen will display all your swap/wish offers. Click on title against the offer. In the ensuing screen you can change the status to be delivered by just clicking on the 'Change status'.