Unless you have established credit in advance with us, you will pay the entire contract price in cash or by certified check at least three (3) business days prior to your function or by personal bank check two (2) weeks prior to your function. If you have established credit, payment in full will be due within thirty (30) days of your function. If you prefer, all charges can be paid by credit card. Hilton San Francisco Union Square accepts American Express, MasterCard, Visa, Diners Club, Discover Card, and JCB International. If credit has not been approved for your function, you will provide us with the credit card to which all estimated master account charges will be charged no later than seven (7) days in advance. If credit has been approved, you will provide us with your credit card information at the time of your function.