Provide proof of relevant expenses and ask the principal to sign it for reimbursement.
Expense reimbursement refers to the fund settlement activities handled by the business handling department in accordance with the prescribed examination and approval procedures after the business occurs. Reimbursement accounting should be carried out in strict accordance with the expenditure standards of administrative institutions, saving the use of funds, improving the efficiency of the use of funds, and earmarking funds to ensure the normal operation of the unit.