Letter of Supply (Letter of Commitment)

When you need one

If you want a MAS contract but do not manufacture what you sell, GSA needs evidence that your source will keep supplying you. The document is called a Letter of Supply, or interchangeably a Letter of Commitment. If your vendor is itself a dealer or distributor, you may need a second-level letter from the manufacturer.

What it usually confirms

• The manufacturer authorizes your firm to list its products on the schedule.
• The manufacturer commits to supply for the life of the contract, in quantities that meet federal demand.
• The products comply with the Trade Agreements Act (see TAA).
• Price reductions will be passed to you promptly, so your GSA price list can be updated.

Format

The letter should be on the manufacturer's letterhead and carry an original signature from someone with authority to commit the company. Clean, signed letters go through review quickly; vague or unsigned ones cause requests for clarification.

Is it mandatory?

Regulations do not literally say "Letter of Supply." The requirement is to show a reliable, committed source of supply that GSA accepts. In our experience the letter is the only way that requirement is met in practice, so treat it as mandatory for resellers.