In general, GE Extended Service may require proof of purchase in order to validate coverage for repairs or services. This proof is typically necessary to confirm the warranty status of the appliance and to ensure that the service provided aligns with the terms and conditions of the service plan. It is always advisable to keep the original receipt or proof of purchase in a safe place, as it not only helps in obtaining service but can also facilitate any issues that may arise in the future regarding warranty claims. For specific requirements related to a particular service plan or appliance, it is beneficial to refer to the details on the official GE website or the documentation that came with the service plan, as they provide the most accurate and updated information on the policies in place.