This is where money is set aside to service a customer. Each company will have different reasons as to what type things they will pay for in order to keep a customer (or keep a customer happy). It may be a small amount, such as for gas money to visit the customer or a large amount, such as for taking them on a cruise. So in this case, whatever there was in the past, there is now less.

An expense account account is where money goes out of the business. There are all sorts of expense accounts: inventory; electricity; clients; you name it.