Advantis Claim for debt already paid

[Bluedoughboy]

Hello. We had an overpayment on tax credits-I believe my wife got a pay rise which meant we weren’t entitled to tax credits anymore. HMRC wanted just over a thousand. I wrote to them to say we weren’t in a position to pay it and I’d be paying £2.50 per week until we could. I continued to do this, I don’t recall how long for-a few weeks, couple of months etc. In December we had the money to pay off what was left, under a thousand, so we cleared it.
Today I’ve got a letter from Advantis saying they’d been instructed to collect what seems to be that amount again. I’m certain it’s a mistake and hope it will be easy to sort-any advice on that front would be appreciated.
Our main worry is that we’ve heard such mistakes can still affect your credit score, we’re about to start trying to buy a place and don’t need anything messing with our credit score. Any advice please?

[R0b]

If you have paid it off, the simple answer is to write/email to Advantis and tell them it has already been paid. Provide the necessary information such as time, date of payment and any payment reference number.

Your wife may as well make a subject access request to HMRC and request all information they hold about her relating to the tax credits. That should have a record of your payment.