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ARTICLE · 16 JULY 2026

DoW’s Anthropic Ban Goes Live: A Confusing Patchwork Of Certification Demands For Contractors

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The Department of War has designated Anthropic as a supply chain risk, marking the first time such a designation has been applied to an American company. Defense contractors are now receiving varied and inconsistent certification requests from multiple agencies and prime contractors, each demanding different scopes, deadlines, and attestations regarding the use of Anthropic products like Claude. Understanding the nuances of each request and responding with precision has become critical as contractors naviga

United StatesGovernment, Public Sector
Ryan Frazee
Ryan Frazee
Adam S. Hickey
Adam S. Hickey
John Prairie
John Prairie
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The Department of War (“DoW”) is now moving out on enforcement of its March 2026 designation of Anthropic as a “supply chain risk,” the first such designation ever applied to an American company. Contractors across the defense-industrial base are receiving agency and prime-contractor requests to identify, remove, and certify non-use of Anthropic products and services, including Claude, and those requests are arriving quickly and from multiple directions at once.

The most important thing for contractors to understand right now is that implementation is not uniform. Different agencies—and even different offices within the same agency—are sending materially different certification requests, with different deadlines, different scopes, and different certification language. Prime contractors are adding another layer of variation: several are drafting their own certification forms based on whatever request they received from their government customer, so a subcontractor may receive a

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