What is Unsolicited Goods?

Legal Definition
In the realm of the United Kingdom unsolicited goods are goods delivered to an individual with a view to the individual acquiring them, but where the individual has no reasonable cause to believe that they were delivered for legitimate business and had not previously agreed to acquire them. These were regulated under the Unsolicited Goods Act 1971 but the Consumer Protection (Distance Selling) Regulations 2000 are stricter in every respect rendering the 1971 Act largely redundant from a consumer law perspective, although there is no express repeal. However the said distance selling regulations only apply to consumers so a business receiving the goods on an unsolicited basis would need to look at the 1971 Act. Also with effect from 14 June 2014 the distance regulations are replaced by The Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013 which include a new s 29A added to the Consumer Protection from Unfair Trading Regulations 2008 making it clear the consumer may keep unsolicited goods. The 2008 regulations prohibit as a criminal offence various unfair advertising and marketing practices and in paragraph 29 of Schedule 1 make it a criminal offence to engage in "Demanding immediate or deferred payment for or the return or safekeeping of products supplied by the trader, but not solicited by the consumer, except where the product is a substitute supplied in accordance with regulation 19(7) of the Consumer Protection (Distance Selling) Regulations 2000 (inertia selling)".
-- Wikipedia