Nine AI iterations in one afternoon produced a document the customer's procurement team accepted without a single revision request.

A contract manufacturer needed to ask a multinational customer for a six-figure advance payment before production could begin. The BD manager handling it had zero experience in formal commercial negotiation, no senior manager to call, and no template that came close to covering it.

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How the proposal was built

The BD manager briefed Claude in plain language: the contract value, the material cost, the advance amount, the customer's profile, and the outcome needed. The first draft came back generic: right structure, wrong tone. It framed the request as a commercial partnership, split the payment into two milestone tranches, and tied repayment to the first three shipments.

Each of the next eight revisions was a short, specific prompt. One example: "The milestone release in clause 2 is tied to delivery confirmation. Revise it so the release trigger is the customer's goods received note, not our shipping date." By iteration six, the payment mechanics were solid. The last three iterations fixed tone, so the proposal read like a confident supplier, not a factory scrambling for cash.

What the final document contained

Four pages: the commercial context, framed as a capacity investment rather than a cash request; two payment tranches tied to purchase order issuance and material delivery; a repayment mechanism deducting a fixed amount per shipment across twelve months; and a plain-language default clause. The deal closed the following week.

Before you start any commercial proposal with AI

  • Write out the deal facts in plain language before opening the AI tool
  • Know your outcome: what does acceptance look like, what are the minimum terms you can accept
  • Profile your counterpart: risk appetite, procurement culture, decision-making speed
  • Prepare for the most likely pushback before you send
  • Review every clause for unintended liability before submitting
  • Don't send AI output without a human read for tone and accuracy