A 50% deposit must be received at ATTA for the filters 30 days prior to your event date. Filter components are shipped after your agreement is signed by you and an ATTA staff member and 50% of the total cost has been received at ATTA. In good faith we ship filters expecting full payment to ATTA within 30 days of your event. Because we are a non-profit organization, we can not accept partial payments once your filters are shipped. For example, if you order 50 filters, you are responsible to donate and raise the full amount needed for 50 filters. Deposits and Payments can be made with a Certified Check or Money Order, Credit Card, or through a ATTA online Giving Campaign. Cash and personal checks are not accepted.