After you have received the money you have to put the Match day sales as paid.

Here's how you do this: 

1. Tick the "Payment completed" option.

2.  After you have saved it, a contract number will appear at the top left. Top right you can see that the status of the contract is Final and that the installments have been set up.

3. At the tab of the installments you can see that the payment is complete.