Cash is the currency used in POSTAL 2 and its expansions.
At the start of POSTAL 2, the Postal Dude has $20 at hand, but as the game progresses cash can be stolen from houses, shops, ATMs and even the bank. Generally, Cash can be used to purchase helpful items such as Health Pipes or food, but its main purpose is to make the player's task a little more easier for a price. On multiple occasions, a choice is given on whether to pay for an Errand Item or not. Paying will usually prevent Police attention and an overall bloodbath (the prices however are ridiculously high), while not paying will result in the shopkeeper and the Police retaliating.