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) February 10, 2020 20:33 Updated Please send the certificate directly to maxon precision motors in America. Orders from the online-shop are not delivered duty paid. Related articles We are from a university and are working on a project. Does maxon support universities? Electromagnetic emissions with DC motors Which payment methods are there in the online-shop? CAN bus topology and bus termination Which extra charges do I need to pay in the online-shop? Comments 0 comments Article is closed for comments.