R.I. Gen. Laws § 11-44-30: Posting of signs — Types.

Whenever any signs are required to be posted to indicate no trespassing, shooting, trapping, fishing, or the like, it shall be sufficient to post the land conspicuously with clear and legible signs which signs can be affixed with cloth, metal, or paperboard, or by conspicuously stencil-painting the word “Posted.”