Definicja negative transaction type
A negative transaction type is defined for each movement type in customizing for accountable properties to account for differences between a transaction type already posted and the actual value.
For example, if you post a value for a purchase order in the amount of $100 and the invoice subsequently comes in at $90, you cannot account for the -$10 difference using a credit against the original posting. You must make a posting using the negative transaction type defined for the movement type.
Słownik i definicje SAPa na N.