Bad Debt Relief (BDR) is a mechanism which goes some way to protect a business from payment defaulters. Under the normal rules of VAT, a supplier is required to account for output tax, even if the supply has not been paid for (however, the use of cash accounting or certain retail schemes removes the problem of VAT on bad debts from the supplier). The specific relief for unpaid VAT is via the BDR scheme.
Source: marcusward.co
