CITES Documentation Lookup Form Please use this form to locate your CITES documentation. Manufacturer*CF Martin & CoSchecterSigmaSerial Number*Enter your Serial Number here. No spaces, dashes or other characters. If your serial number doesn't produce a valid link, please contact us on the next screen and we'll get back to you. CAPTCHAPrivacy* By using this form you agree with the storage and handling of your data by this website. EmailThis field is for validation purposes and should be left unchanged.