I am an American customer and do not have to pay sales tax. How can I submit the custom exemption certificate? Follow Sandra Portmann July 24, 2018 09:26 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? PWM power stage: Current ripple & Motor chokes How to buy a product from maxon motor? Formulae Handbook Comments 0 comments Please sign in to leave a comment.