Most Italian bartenders prepare a caffè corretto simply adding a few drops of the desired liquor into an espresso shot; however in some cases the liquor is served in a shot alongside the coffee allowing the customer to pour the quantity he desires. A few bartenders also let their regular customers make their drink themselves providing the espresso shot and the liquor's bottle.
The Italian word 'corretto' corresponds to the English word 'correct' in the sense of 'corrected'. The term is now an Italian Phraseme.
In Spain, a similar drink is known as carajillo, and in Sweden, Norway and Denmark as kaffekask, karsk and kaffepunch, (although "karsk" or kaffe is in fact coffee added to moonshine to make the moonshine palatable, rather than liquor added to coffee for flavor) respectively.