For this reason, ISO 4217 does not include a separate currency code for the Guernsey pound; when distinction from sterling is desired the abbreviation GGP may be used.

This was rescinded two years later and French currency, supplemented by local issues, continued to circulate.

The World War I issues of banknotes were overstamped with the word "British" to indicate this change.

The Guernsey pound, and other notes denominated in sterling (including those issued by the Bank of England, Scottish, Manx and Northern Irish notes and the Jersey pound) may be used in Guernsey.

These featured the Island's seal and name (now given as S'Ballivie Insule de Gernereve) on the obverse with the English name, the date and the Guernsey lily on the reverse.

Threepence coins were also issued from 1956, with the same obverse and a reverse featuring the Guernsey cow.

The 1981 coin was significantly thinner than the modern version and the diameter also measured slightly less.

In 1921, States notes were over-stamped with the word "British" to signify the island's conversion to a pound equal to sterling.

It is similar to the regular issue, but with the QE60 letter prefix, the commemorative laurel wreath on the lower left corner of the note, and additional wording.

[6] A commemorative £1 note was issued on 4 July 2013 to mark 200 years since the first commercial operation of Thomas De La Rue.

[7] On 8 November 2018, a commemorative banknote of £20 was issued to mark the 100th anniversary of the end of World War I.

It is like the preceding 2012 commemorative issue, but with the seal of the Bailiwick of Guernsey surrounded by poppy flowers and containing the serial letter prefix "TG/W" (for "The Great War").

In January 2023 Guernsey advised that notes produced for the island by De La Rue plc will in future include PUREIMAGE™ and IGNITE® security threads and the NEXUS™ embedded stripe.