Which of the following is a requirement for claims involving personal property damage?

Witness statements are a key requirement for claims involving personal property damage as they provide firsthand accounts of the incident in question. Such statements can help establish the circumstances surrounding the damage, whether it was caused by negligence, an accident, or other factors. They serve as critical supportive documentation when investigating claims, offering perspectives that can help verify the details of the event.

In the context of property damage claims, witness statements can substantiate the owner's account of the incident, contributing to a clearer understanding of what transpired. This is especially important when there are disputes regarding the event or the extent of the damage.

The other options—an owner's manual, a notarized letter, or a service contract—do not serve the same pivotal role in establishing the event leading to the damage. While they may be useful in specific contexts (such as determining how products should function or proving ownership), they do not provide the immediate factual narrative necessary for substantiating claims about the incident itself.