I agree too but …..
This does seem to be one of those cases where it seems unfair – if, that is, the clmt has genuinely been trying to get IR to change their decision and stop the award, he’s held on to the monies received and paid it all back in full as soon as IR agreed.
It all works fine if there is an ongoing tax credit award which would then be reduced to recover the overpayment – it would all ‘balance out’ over time. In this case, the clmt is definitely losing out.
What if a bank error had resulted in regular payments into someone’s account that was then demanded back after the account holder alerted the bank?
The decision to include the tax credits is definitely the correct one, though.