1, first of all, the reimbursement of expenses and invoices (invoice joint), and the actual costs incurred need to match. For example: the invoice obtained from the catering industry, can not go to reimburse the purchase of office supplies, retail invoices can not be reimbursed for the payment of service fees and so on. 2, the invoice date and reimbursement time can not be too long a difference, the amount must be the same case. The invoice should have a good invoice stamp. 3, the reimbursement system of different companies will have differences. Some companies have better financial internal control, usually, for example, the amount is relatively large, can be included in the company's fixed assets, in the reimbursement before the procurement staff will be required to obtain a VAT invoice from the purchaser. Reimbursement of the audit process is: audit the authenticity of the expenses incurred - "the authenticity of the invoice, invoices, reimbursement form is normal, whether the amount of reimbursement over the amount of invoices provided - "to be reimbursed whether the amount of reimbursement is in the control of the reimbursement range --- The signature of the relevant person in charge --- The expenses that are correctly audited will be reimbursed, and the expenses that do not meet the requirements will be returned.