Please double check this.
Both CHB and tax credits have fallen under the domain of HMRC for a while, and it is suprising to learn a Job Centre is still taking applications for it.
I wish ours were so helpful! They'd have thumbed us in the direction of the library.
All these payments come from the HMRC and should appear on bank statements are credits under their proper names.
It is possible for awards to be made erroneously. However, the onus is on the claimant to determine if and where an error has occurred, and be responsible for repayment if one has, so it might be prudent to double check.