To answer your question, you need to read the "covenants, conditions and restrictions" recorded on your property as well as the association's rules concerning the posting of actual documents on the condominium association's bulletin board concerning who owns the actual posted document.If the association's rules and the recorded "covenants, conditions and restrictions" are silent as to who actually owns the posted document on the association's bulletin board, the posted document typically belongs to the person who posted it. However, an argument could be made that the document posted was a "gift" to the homeowners unless something is written upon it requesting its return by a certain date.The issue becomes how long should the posted document remain on the bulletin board until it is discarded or deemed an "abandoned" article.