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Save, manage and quickly reuse your holder numbers for easier Premium Bonds prize checking. Premium Bonds Prizes Holder Number Manager makes it quicker and easier to use the NS&I Premium Bonds Prize Checker, particularly if you regularly check more than one holder number. KEY FEATURES • Save holder numbers for quick access when checking Premium Bonds prizes. • Give each saved holder number a friendly name to help identify it. • Quickly select and reuse saved holder numbers without typing them again. • Rename or remove saved holder numbers whenever you want. • Validate holder numbers before saving them. • Check holder number formatting before submitting a prize check. • Automatically remove unsupported special characters from holder number entry. • Provides clearer feedback when an entered holder number appears to be invalid. • Works with both the main Prize Checker and the "Check another holder's number" section. PRIVACY Saved holder numbers and the names you give them are stored locally using Chrome extension storage. They are not sent to or collected by the extension developer. When validation is required, the holder number is sent directly to NS&I's existing Prize Checker service so that it can be checked. The extension is limited to the public NS&I Premium Bonds Prize Checker. It does not access NS&I login pages, passwords, authentication information or your online NS&I account. INDEPENDENT EXTENSION Premium Bonds Prizes Holder Number Manager is an independent, unofficial browser extension. It is not an NS&I product and is not affiliated with, endorsed by, approved by, maintained by or supported by National Savings and Investments (NS&I). The extension does not calculate or determine Premium Bonds prize results. Prize results are provided by NS&I's existing Premium Bonds Prize Checker.
Aug 13, 2026
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