The statistics show that paying prizes directly to the customers bank account has reduced the proportion of Premium Bonds prizes that go unclaimed compared to issuing warrants (cheques).
Since 2011, Premium Bonds holders have been able to have their prizes paid directly into a UK bank account in their name. Between 2011 and end of June 2018, NS&I paid out 110,300,054 prizes by warrant. Of these 569,461 (0.5%) have not yet been cashed and are therefore deemed unclaimed. In comparison between 2011 and December 2020, NS&I have paid out 72,385,607 directly to customers’ bank account. As of September 2020, of these 8,610 (0.01%) of the prizes have not been claimed.