Tax rebate came with fees deducted, why?

[Guest]

I received a p800 from HM revenue and customs, within the letter it was explained I over paid tax by £172.88 and was due it back, great I thought, I've never had a tax rebate before, I wasn't expecting it nor did I seek one, the letter indacted they would send the cheque to "FLYE OFFICE SERVICE BUREAU" within 14 days, I didn't think anything of it as over never had a rebate before.
Today I received a letter from Clyde office service bureau with my check, only my check is only 110.64 and not the 172.88, the letter states they have deducted a fee for my case. The thing is I've never asked FOSB to represent me in any case, why didn't HMRC just send the check to me, why are FSOB taking a cut that culculates to 36%?
Is this normal practise?

[astarcg]

Sorry posted as guest by accident, that should read "fylde office service bureau'

[Morlock]

You will need to contact FSOB and dispute the charge as it may be in the terms and conditions of your employment contract that it can charge an administrative fee. You should at least request an explanation for the £67.24 deduction. That's assuming the overpayment was a result of your employment through FSOB.