Minn. Stat. § 326B.87
The license number of a licensee must be placed on all building permits and building permit applications made to or issued by the state or a political subdivision. In jurisdictions that have not adopted the State Building Code, the license number must be placed on the site plan review or zoning permit. License numbers must be on all business cards and all contracts to perform work for which a license is required.
The license number of a licensee must appear in any advertising by that licensee including but not limited to signs, vehicles, business cards, published display ads, flyers, brochures, websites, and Internet ads.
Contracts entered into by a licensee must state that the person is licensed and must state the license number.
Minn. Stat. § 326B.87
1991 c 306 s 19; 1995 c 169 s 5; 2007 c 140 art 8 s 21, 30; art 13 s 4