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DD Form 448 represents the Military Interdepartmental Purchase Request. It’s used when one DoD activity needs to obtain goods or services from another DoD activity. The form documents an interdepartmental transaction and triggers the funding transfer between the two DoD components, enabling the receiving activity to procure on behalf of the requesting activity and bill the appropriate funds. This is different from small, on-the-spot purchases from a commercial vendor (SF 44), formal contracts or orders for commercial items (SF 1449), or government purchase orders issued against a contract (DD Form 1155). In short, DD Form 448 is for interdepartmental DoD purchases.