A retailer prefers to display its best selling products and promotion programme on the building...

Fisher v Bell [1960] and Pharmaceutical Society of Great Britain v Boots Cash Chemists [1953] identified that the courts will generally consider goods advertised in shop windows or those with a price tag attached to constitute an invitation to treat. An invitation to treat is a concept in contract law. It refers to an invitation for a party to make an offer enter into contractual negotiations.

Invitations to treat can be anything displayed to a large number of people, as long as there is no defined way to choose who can accept. Items on display in a shop, advertisements, and catalogues are all common examples of invitations to treat.

However, there are cases in the US shows that under some circumstances an advertisement can become an offer (see Leftkowitz v Great Minneapolis Surplus Stores [1957]).