A bill of sale is a written document recording the transfer of ownership of identifiable movable property from a seller to a buyer, usually for a stated price. In commercial practice it is used to evidence title, clarify the assets sold and allocate risk, particularly where delivery or payment is deferred.Across England and Wales, Scotland, Northern Ireland and Ireland, the basic concept is consistent, but the formal legal treatment differs. In England and Wales, and to a lesser extent in Northern Ireland, “bill of sale” is also a technical term under the Bills of Sale Acts, referring to security over personal chattels granted by individuals; these instruments are heavily regulated, require prescribed form and registration, and are distinct from simple sale documents. In Ireland, the Bills of Sale (Ireland) Acts perform a similar security function.In Scotland, security over moveables is governed by different doctrines and recent statutory reform, so “bill of sale” is usually understood in a non‑technical, descriptive sense as a document evidencing sale.Practitioners use bills of sale in asset sales, transfers of business equipment, vehicles, ships and other chattels, often alongside warranties, title undertakings and completion mechanics.