This technical bulletin was developed to help owners of measuring equipment reduce risk and optimize their expenses in calibration. All measuring equipment requires calibration; however, there are many different types of calibrations which can lead to false assumptions and missed expectations. All too often, the end-user is either wasting money on unnecessary calibration, or worse, they are exposing their organization to unforeseen quality risks. This is especially true when contracting external calibration services. This bulletin provides recommended language when contracting calibration services and a ten-point checklist to follow.