General purchasing conditions: what now?

Questioner

If two parties have reached an agreement on the general purchasing conditions and this is recorded in writing, are you still obligated to refer to that document in purchase orders? That document states that the general purchasing conditions apply to all orders placed with the supplier.

Questioner

If the parties involved have clearly agreed that these terms and conditions apply to all transactions, then this isn't strictly necessary. However, I would advise the buyer to always mention this with every order placed, to avoid misunderstandings, for example, if new people join the seller's team.