Difference between prox and split terms
You can define specific days of the month as the net due date and optional discount dates with both split and prox terms. Split terms have the added ability to split a month into five segments, each having a unique net due date and discount date.
The key difference is the number of due dates during the month. Use Prox terms to limit the number of due dates to one per month. Use split terms to have more than one net due date each month.