C.R.S. § 24-34-702

The production of any such communication, paper, poster, folder, manuscript, book, pamphlet, writing, print, letter, notice, or advertisement, purporting to relate to any such place and to be made by any person being the owner, lessee, proprietor, agent, superintendent, manager, or employee thereof, shall be presumptive evidence in any civil or criminal action or prosecution that the same was authorized by such person.