Thirdly, the bill provides that if an uninvited seller is on or approaching residential premises for the purpose of selling something, the seller must leave or not enter if directed by a consumer. A direction can be written or verbal and can be specific or general, such as a "do not knock" sticker on a letterbox, so if a mobile truck shop shows up and tries to knock on a consumer's door, despite seeing a "do not knock" sticker, the trader would be legally obliged to leave the premises or face penalties. The provision originates from a concern identified in our review of consumer credit law in 2018. It found that consumers are often preyed upon by mobile traders and that measures that they take to deter such traders at present—such as putting up "do not knock" stickers—do not have a legal effect currently. This is a result of the way the courts have interpreted the Trespass Act 1980. The courts have stated that broadly worded notices such as "do not knock" stickers are not legally enforceable under the Trespass Act.