In order to make explicit the amount in words on a check (BrE "cheque"), Americans write "three and " (using this solidus construction or with a horizontal division line): they do not need to write the word "dollars" as it is usually already printed on the check. On a cheque UK residents would write "three pounds and 24 pence", "three pounds ‒ 24", or "three pounds ‒ 24p" since the currency unit is not preprinted. To make unauthorised amendment difficult, it is useful to have an expression terminator even when a whole number of dollars/pounds is in use: thus, Americans would write "three and " or "three and " on a three-dollar check (so that it cannot easily be changed to, for example, "three million"), and UK residents would write "three pounds only".