Families that use family office services expect family office professionals to help them mitigate risks, both to investments and to concentrated illiquid holdings, such as real estate or closely-held businesses. What sometimes goes overlooked, however, is how to mitigate the risks of ownership of artworks, numismatics, jewelry, cars, and other collectibles. Risk mitigation for these treasures begins with documenting what the client has, aggregating the individual items into collections, and beginning the management of the items as a collection.