Prior to the release of any notes by the Bank of England, all serial numbers were recorded in ledgers so the bank could verify its liabilities; these numbers were checked when the notes circulated back through the bank.
Sebelum Bank Inggris merilis uang-uang kertas apapun, seluruh nomor seri dicatat sehingga bank dapat memverifikasi pengesahannya; nomor-nomor tersebut dicek saat uang-uang kertas yang diedarkan kembali ke bank.