Apple will no longer repair iPhones that have been reported as stolen or lost.

Apple’s repair policy has been amended to exclude iPhones that have been reported as lost or stolen in the GSMA Device Registry database.
Apple will no longer fix iPhones that have been reported stolen or lost through the GSMA Device Registry. This indicates that Apple Store staff and Apple Authorized Support Providers will refuse to fix iPhones that have been identified as lost in the Mobile Genius or GSX systems that they are using to even provide customer support.
According to an internal document obtained by MacRumors, Apple now will check the GSMA Device Registry database to see if an iPhone has been recorded as lost before proceeding with the repair process. The technicians must refuse the repair if indeed the database or company’s internal systems show an iPhone “reported as missing.”
This is not a new policy; rather, it is an extension of Apple’s current policy of not providing repairs for lost or stolen devices. However, this only applies to iPhones with the Find My function turned on. To prevent the sale of stolen iPhones, the new limitation will apply to iPhones that have the Find My Tracking feature disabled. iPhones with Find My Location enabled will continue to be ineligible for repair.
What is the GSMA Device Registry, and what does it do?
The GSMA Device Registry is a global database of device serial numbers with information on whether a device was lost or stolen, which Apple will utilise to identify the exact condition of the iPhone brought in for repair. For example, if you report your phone as stolen, the police may enter it into this database as stolen. Mobile phone carriers use this information, together with a device’s IMEI number, to determine the device’s accurate status.