Which method is allowable for shipping cremated remains?

The method of shipping cremated remains that is allowable is the one that requires a tracing system and receipt. This is important because shipping cremated remains comes with legal and regulatory requirements aimed at ensuring that the remains are handled with respect and tracked throughout the shipping process. When a method involves an internal tracing system, it provides an assurance of accountability and the ability to confirm that the remains arrive at their intended destination.

Regular postal service alone does not ensure the necessary tracking, which could lead to concerns regarding accountability and the handling of sensitive materials. Additionally, airline cargo without tracking lacks the vital oversight needed when transporting cremated remains, which can also pose logistical and regulatory challenges. Lastly, while personal delivery is a valid option, it is not the only method provided for shipment and may not be feasible in every situation. Thus, the emphasis on a method with a tracing system and receipt ensures compliance with legal standards and proper handling of cremated remains.