If the Tax Credit Office don’t have your bank account deails, the Office can pay your tax credits by cheque rather than straight into your bank account. But from 6 April 2012, they'll only do this for the first four weeks that they don't have your account details.
If you haven't given details of an account for your tax credits to be paid into, the Tax Credit Office will contact you. You will then need to give account details within four weeks, or your payments could be stopped.
If they don’t contact you, call the Tax Credit Office with your bank account details on 0345 300 3900.