How the agreement behaves after signature
An agreement earns its cost on the orders that follow, not on the order that produced it. The order that triggers signature is rarely the one that tests any clause: it is usually a familiar specification against a known supplier on a routine run, and everything moves because both sides already know what to do. The clause block earns its keep on the second or third order, when something has changed — a recipient list, an artwork version, a delivery address, a contact, a size split — and somebody has to ask whether the agreement still covers it. The answer should be findable in the file without a conversation.
Use the agreement as the reference rather than the original order. New orders should arrive as a short order acknowledgement that states the order number, the specification annex version, the milestone dates agreed for this specific order, the delivery address and incoterm, and the named approver at each gate. Anything not on the acknowledgement is governed by the agreement. Anything that contradicts it has to be in a written amendment — not in a follow-up email, not in a note on a delivery note, not in a phone call. The practical test is whether a person who has never met either party could pick up the file, read the agreement and the order acknowledgement together, and understand what is being supplied, by when, against what standard, and what the remedy is if any of those proves wrong. If that reader has to ask a question, the file is incomplete.
Keep a small register of amendments at the front of the file. Each amendment is a number, a date, a one-line description, the document it changed, and the two sets of initials. Maintaining it costs almost nothing; reconstructing an arrangement two years into a programme without one costs a great deal, and is the moment when contracts written to be clear start to look ambiguous. Once a year, review the agreement against what has actually been ordered and what has actually gone wrong in the period just ended. A clause that has never been invoked is either unnecessary or has never been tested, and the review is what distinguishes the two. Where a clause has been invoked, the review also reveals whether its wording survived the situation it was written for: if the argument the clause was meant to prevent was replaced by a different argument in practice, the clause is the next document to redraft, before that different argument becomes the one a future order produces.
When the programme ends, decide what survives. Some clauses should explicitly outlive the agreement — confidentiality, ownership of supplied artwork, an obligation to return or destroy confidential material, an indemnity for a defined period. Others should not — pricing for the next order, the named approver, the production window. Naming which is which removes the question that would otherwise be raised by the next supplier, the next programme, or the next internal review, and converts the end of a programme from a legal transition into an administrative one. A vendor agreement that does not specify what survives is, in practice, one that does not survive.