If a company wants to procure a GSA Schedule Contract, but does not manufacture those goods it sells, a Letter of Supply (LOS) becomes a requirement. GSA uses the term Letter of Commitment interchangeably with LOS.
THE LETTER OF SUPPLY GENERALLY CONFIRMS:
THE LETTER OF SUPPLY SHOULD:
Have the original signature of an authorized representative of the firm meaning someone that can commit the company. The letter also should be printed on the original letterhead of the manufacturer.
IS A LETTER OF SUPPLY MANDATORY?
This question is very common and quite often asked as the regulations don’t specifically spell out the need for a Letter of Supply. Technically the requirement calls for the firm to prove the firm has a reliable and committed supply source that is acceptable to the GSA. However, the only way we have experienced this requirement being met by a GSA applicant is through the use of a Letter of Supply.