| Origin and right to sell | Supplier, acquisition channel, previous owner or program where available, invoice, and restricted-goods checks | Sample chain of custody and reconcile lot documents to received units | Serials are removed, altered, reported, duplicated, or cannot be connected to lawful inventory |
| Model and configuration | Exact model, region, storage or capacity, hardware revision, color, carrier or lock status, and included parts | Read device or product identifiers and compare with labels and order matrix | Mixed variants are represented as one grade or incompatible regional models are undisclosed |
| Data and accounts | Data-erasure method, completion record, account removal, activation status, and exception handling | Sample boot, reset, lock, management profile, and recovery behavior without exposing personal data | User data, activation lock, enterprise management, or unknown credentials remain |
| Functional condition | Test checklist by model covering core functions, ports, controls, connectivity, sensors, display, audio, and error codes | Run repeatable pass/fail tests and retain result by serial or unit identifier | Grade relies on power-on only or intermittent failures are not recorded |
| Battery and consumables | Health metric and method, cycle or capacity where available, charging result, swelling or damage check, and replacement rule | Use a defined method and verify replaced parts, rating, fit, protection, and disclosure | Unsafe condition, unexplained reset, inconsistent health method, or undisclosed aftermarket replacement |
| Cosmetic condition | Viewing method, grade limits by surface, maximum scratch or dent, screen criteria, discoloration, missing parts, and photos | Grade under consistent light and distance, then audit boundary cases | Supplier grades are subjective, mixed, or changed after buyer approval |
| Repair and parts | Repairs performed, parts replaced, source or type, software or firmware action, technician or facility, and final test | Inspect repair quality and compare parts claims with sample evidence where possible | Safety-relevant, serialized, or performance-critical replacements are hidden |
| Warranty and returns | Coverage, exclusions, start date, claim evidence, return route, repair or replacement rule, freight, and reserve | Run a fictional claim through the supplier process before ordering volume | The warranty cannot be executed across borders or excludes the common failure modes |
| Packaging and transport | Unit protection, accessory separation, battery status, labels, carton limits, moisture or shock controls, and transport review | Pack and inspect a representative unit, then reconcile final cartons to serials | Pack method creates damage, short circuit, mix-up, or loss of traceability |