In legal and commercial practice, an independent private payphone is a coin- or card-operated telephone installed and operated by a private individual or organisation on private premises (for example a shop, pub or hotel). The premises owner or renter controls
access, sets or agrees the call tariff, and collects the revenues, typically under a site agreement with a payphone service provider.
The expression is descriptive rather than a defined statutory term. Regulatory characterisation turns on whether the phone is made available to the public. If it is publicly accessible, it is generally treated as a public pay telephone and subject to telecommunications regulation (including Ofcom General Conditions in the UK and ComReg requirements in Ireland) regarding, for example, free access to 999/112 and clear price information. Where access is limited to a closed user group (such as employees or residents), fewer public payphone obligations may apply, though general consumer, contract and safety duties still apply.
Terminology and practical treatment are broadly consistent across England and Wales, Scotland, Northern Ireland and Ireland.