But, if you get caught they reduce your pension to what the amount should have been when they say you left, my friend had to pay the over payments back. What happens if you have no money, dunno...But fore sure, if they have the evidence, you will not still get the pension of the day..
UK revenue, has fines, caught fiddling the pension is/was 1000 quid. Late tax return, 100 quid. 😢