I am an American customer and do not have to pay sales tax. How can I submit the custom exemption certificate? Follow Sandra Portmann (mmag / Global Sales Support) July 20, 2022 12:18 Updated Please send the certificate directly to maxon precision motors in America. Orders from the online-shop are not delivered duty paid. Related articles Which extra charges do I need to pay in the online-shop? Where do I see the availability of the products? We are from a university and are working on a project. Does maxon support universities? Comments 0 comments Article is closed for comments.