Please be aware that as of January 1, 2016 we will no longer be sending calibration notifications by mail. All notifications will henceforth be sent by email. If you have not yet ensured that we have a valid email address, please notify us at firstname.lastname@example.org. Please remember that calibration notifications are a courtesy. We do our best to send such notifications. However, the ultimate responsibility for keeping calibrations current belongs to the customer.