Betfair Help on X: "@psyafe unfortunately currency cannot be change on an account once it has been set" / X.

One of the most popular football bets is an accumulator, also known as an 'acca', which combines bets from multiple games into one bet to create a bigger payout. This is done by multiplying the odds together of each individual selection and allows the player to bet on every outcome happening in a single bet.

: a bet placed with a bookmaker whereby a bettor has money on a horse in a subsequent race provided his horse in an earlier race wins.