The term 'HARTS' can be found in the crossword solutions STAGS. This is an acronym for the Society of Ticket Agents and Retailers, which is a trade association that represents the interests of ticket agents and retailers in the United Kingdom. The organization was founded in 1992 and works to ensure that ticketing services are provided in a fair and transparent manner. It also provides advice and support to its members on a range of topics, including consumer protection, data protection, and anti-fraud measures.