Goods sent to someone (other than a trader) who has not asked for them to be sent. It is not in itself an offence to send unsolicited goods (except for matter describing human sexual techniques or advertisements for such matter), but it is a criminal offence to demand payment for them. A person who receives unsolicited goods is an involuntary bailee of them (see bailment) and may not destroy or damage them. If he disposes of them, he might be guilty of theft. Statute, however, permits him to treat them as his own property after six months (or 30 days if he has asked the sender to take them back).