Often bundled travel packages appear to be a cost savings. However, the documentation and receipts typically do not itemize what is included in the purchase price, so the receipts are insufficient per IRS rules for substantiating the business-related nature of what is being paid for. Unless the traveler confirms with the package provider that an itemized receipt for all included expenses (airfare, hotel, car rental, etc.) will be provided, it is best to avoid purchasing a package. Insufficient documentation could result in the denial of a reimbursement.