If you are visiting Jersey from the UK then the good news is that Jersey accepts British currency, saving you time and hassle and keeping things simple.
The livres (‘livre tournois’), which were French coins, were the currency of Jersey until 1834. Nowadays Jersey has its own currency – the Jersey pound, but all UK notes and coins are legal tender here and circulate with the Channel Islands issue. Jersey Pound Sterling (JEP) has the same value as GBP) and notes are in the same denominations of £50, £20, £10 and £5. Coins are in denominations of £2, £1, 50p, 20p, 10p, 5p, 2p and 1p.
Channel Islands notes and coins are not accepted in the UK, although they can be reconverted at parity in UK banks. Credit cards are widely accepted in Jersey.