The accounting treatment should be to recognise the income when it is earned , not when it is received. So the entry would be debit debtors in the balance sheet and credit income in the profit and loss. The directors then have to decide whether in their opinion, the money will be received or not.If they think it will be, it should be shown by way of notes to the Accounts. A note has no effect on the numbers but would mention the potential fine in what is called a contingent liability. If the Directors think it is not recoverable it would debit a fines account in the profit and loss and provide a credit the balance sheet to reduce debtors.
In this case the income would be declared in the year when the decision is made by EUFA to cancel the fine.