Guide
What is a Letter of Request in Foreign Military Sales?
A is a partner government's written request to the U.S. Government for defense articles or services — a letter, message, e-mail or in any format — addressed to the authorized to sell the item, with on distribution. Case development cannot start until the has assessed the request against the manual's mandatory "actionable" criteria; the manual sets no performance standard for that assessment but encourages follow-up with the purchaser after 30 days, gives the 10 working days to comment when an Advisory is required, and expects a rough-order-of-magnitude pricing response within 30 days.
What is a Letter of Request?
Upon identifying U.S. systems and/or services to meet defense requirements, the international partner may submit a to the . An can be communicated through formal correspondence (such as a letter or message), email, or a . Less formal methods of communication such as minutes to a meeting or perhaps even oral discussions may be acceptable for transmission of an , but representatives should ensure that the request is appropriately documented for future reference and accountability. C5.2 has a detailed discussion on .
References
SAMM
- SAMM GLOSSARY/letter-of-request-lor — Letter of Request (LOR)
- SAMM C5.2.1.1
- SAMM C5.2 — Letter of Request Submissions.
- SAMM C5.2.1 — Letter of Request Format and Information Requirements.
- SAMM C5.2.2 — Letter of Request Submission Procedures.
- SAMM C5.2.3 — The Department of Defense Components Authorized to Receive Letters of Request.
- SAMM C5.T3A — Military Department Organizations Authorized to Receive Letters of Request
- SAMM C5.T3B — Other Department of Defense Implementing Agencies Authorized to Receive Letters of Request
- SAMM C5.2.5.2 — Letter of Request Assessment.
- SAMM C5.2.6.1 — Letter of Request Advisory Memoranda.
- SAMM C5.T2 — Letter of Request Submissions Guidelines
- SAMM C5.T6 — Defense Articles or Services that Require Item-specific Letter of Request Advisories or Review
- SAMM C5.F3 — Generic Letter of Request Checklist
- SAMM C5.3.1 — Types of Letter of Request Responses.
- SAMM C5.4 — Rough Order of Magnitude Pricing.
- SAMM C5.5 — Letter of Request Responses - Price and Availability
Public authorities
Facts referenced
- Days after LOR receipt by which the IA is encouraged to follow up if the LOR is not yet actionable (no performance standard is set for this period) — 30 days (as of 11 September 2026) — SAMM C5.2.5.2.2
- Working days for IA comments on an LOR Advisory — 10 working days (as of 11 September 2026) — SAMM C5.2
- Days for the IA to respond to a Rough Order of Magnitude request — 30 days (as of 11 September 2026) — SAMM C5.4.1
- Major Defense Equipment definition — nonrecurring research and development cost above which Significant Military Equipment is MDE (AECA section 47) — $50 million (as of 11 September 2026) — SAMM C5.2.2.3
- Major Defense Equipment definition — total production cost above which Significant Military Equipment is MDE (AECA section 47) — $200 million (as of 11 September 2026) — SAMM C5.2.2.3
Related
Letter of Request (LOR)
The term used to identify a request from an eligible FMS participant country for the purchase of U.S. defense articles and services. The request may be in message or letter format.
SAMM Glossary, as of 12 September 2026
Request for Proposal (RFP)
A solicitation used in negotiated acquisitions to communicate government requirements to prospective contractors and to solicit a proposal.
SAMM Glossary, as of 12 September 2026
Implementing Agency (IA)
The military department or defense agency responsible for the execution of military assistance programs. With respect to FMS, the military department or defense agency assigned responsibility by the Defense Security Cooperation Agency to prepare an LOA and to implement an FMS case. The implementing agency is responsible for the overall management of the actions that will result in delivery of the materials or services set forth in the LOA that was accepted by a foreign country or international organization.
SAMM Glossary, as of 12 September 2026
DSCA — Defense Security Cooperation Agency
SAMM Acronyms, as of 12 September 2026
Glossary entry →Defense Security Cooperation Agency (DSCA) →
LOR — Letter of Request
SAMM Acronyms, as of 12 September 2026
FMS — Foreign Military Sale
SAMM Acronyms, as of 12 September 2026
SCO — Security Cooperation Organization
SAMM Acronyms, as of 12 September 2026
Letter of Offer and Acceptance (LOA)
The legal instrument used by the USG to transfer itemized defense articles, defense services, and design and construction services to foreign partners.
When used under the authorities provided in the Arms Export Control Act for Foreign Military Sales, the LOA is a binding agreement signed by the USG and the foreign partner to transfer such articles and services.
When used under Building Partnership Capacity (BPC) authorities, the BPC LOA is not signed by the Benefitting Partner.
SAMM Glossary, as of 12 September 2026
Price and Availability (P&A)
Implementing Agencies’ (IAs) (Military Department organizations and Defense Agencies) response to requests from a foreign government or international organization (partner) for preliminary pricing and availability for international competitions and requests from authorized USG requesting authorities for building partner capacity. Furnishing of this data does not constitute a commitment for the USG to offer for sale the articles and services for which the data is provided.
SAMM Glossary, as of 12 September 2026
LOA — Letter of Offer and Acceptance
SAMM Acronyms, as of 12 September 2026
Total Case Value (Letter of Offer and Acceptance)
The total value of the Letter of Offer and Acceptance at the time of calculation, which includes the cost of the materiel, services, all Indirect Pricing Components, administrative charges, and all accessorial charges.
SAMM Glossary, as of 12 September 2026
Military Department (MILDEP)
One of the departments within the DoD created by the National Security Act of 1947, as amended. The Military Departments are: the Department of the Air Force, the Department of the Army, and the Department of the Navy.
SAMM Glossary, as of 12 September 2026
Excess Defense Articles (EDA)
Defense articles owned by the USG which are neither procured in anticipation of military assistance or sales requirements, nor procured pursuant to a military assistance or sales order. EDA are items (except construction equipment) that are in excess of the Approved Force Acquisition Objective and Approved Force Retention Stock of all DoD components at the time such articles are dropped from inventory by the supplying agency for delivery to countries or international organizations.
SAMM Glossary, as of 12 September 2026
Leahy Vetting
The U.S. government process to assess whether there is credible information that a specific individual or a specific security force unit has committed a gross violation of human rights.
SAMM Glossary, as of 12 September 2026
Security Assistance (SA)
A group of programs authorized by federal statutes by which the United States provides defense articles, military training, and other defense-related services by grant, lease, loan, credit, or cash sales in furtherance of national policies and objectives, and those that are funded and authorized through the Department of State to be administered by Department of Defense/Defense Security Cooperation Agency, which are considered part of security cooperation.
SAMM Glossary, as of 12 September 2026
DSAMS — Defense Security Assistance Management System
SAMM Acronyms, as of 12 September 2026
Glossary entry →Defense Security Assistance Management Systems (DSAMS) →
EDA — Excess Defense Articles
SAMM Acronyms, as of 12 September 2026
Leahy Law
Term refers to either a statutory restriction imposed by Title 10 U.S.C. § 362 (DoD Leahy Law) or Section 620M of the Foreign Assistance Act of 1961 (DOS Leahy Law) that prohibits assistance to a foreign security force unit if there is credible information that unit has committed a gross violation of human rights. Both the DOS and DoD Leahy laws allow for the remediation of tainted units.
SAMM Glossary, as of 12 September 2026
SAMM — Security Assistance Management Manual
SAMM Acronyms, as of 12 September 2026
Glossary entry →Security Assistance Management Manual (SAMM) →