This would be the case only if the asset does not have any accompanying document. However, if there are documents you can include like a notarized Exchange to Trust Minute, it would be more satisfying to an outside party as proof. Separate trusts can also hold auto and mortgage titles for cars and houses. (Never put high-liability items like cars, trucks, boats, planes, or trains into the same trust with other valuable assets. Keep them all separate. “Never put all your eggs in one basket”.) Always include copies of what documents you have and can include per asset. If it is some purchased item and you still have the proof of purchase, that would be good to be included to show its value.