In DTS, what must travelers provide to support their travel expenses?

Travelers must provide appropriate receipts for all expenses incurred in DTS to validate and support their claims for reimbursement. This requirement ensures that the expenses align with government travel regulations and policies, enabling the Defense Travel System to maintain transparency and accountability in financial reporting. Receipts serve as proof of payment and detail the nature of each expense, which is essential for financial auditing and compliance.

Other options do not fulfill the requirements for supporting travel expenses. A detailed itinerary of personal plans does not provide evidence of actual expenditures and is irrelevant to the reimbursement process. Approval from supervisors is part of the travel authorization process, but it does not serve as documentation for expenses. A travel blog, while potentially providing insight into a traveler's experience, also lacks the necessary financial details required for expense validation.