Although many individuals pay for their hotel stay with a credit card, there are many others, especially business groups that ask to be billed to a master account. These invoices are often thousands of dollars. An association holding an annual convention in a hotel might have twenty to thirty rooms blocked for its officers, meeting space rentals, breakfasts, luncheons, dinners, and breaks, all charged to a single master bill. It is therefore imperative that hotel controllers try to collect the funds as soon as possible. A number of hotel companies send bills to their customers via Federal Express or other courier services if such accounts are more than $25,000.Why? The customer will have to sign for the delivery of the bill. This eliminates the excuse some customers use, saying they never “received” the bill so that they are not at fault for delinquent payment.