Criminals buying illegal firearms in Thailand will be bound by a "death deal" once a purchase is made, reported Harian Metro.
A middleman told the paper that the death deal served as an insurance to ensure that their trade is safeguarded.
A middleman, who wished to be known only as Tam, said those in the trade regarded the death warranty as a done deal the moment the weapons were handed over to the buyers.
He said for every weapon sold, the trader or the agent would keep a bullet that would be used against the buyer if their secret was exposed to the authorities.
"Whether they (the buyer) realise this or not, that is the (unspoken) deal sealed when they buy weapons in the black market, and use our services as delivery agents," said Tam.
He claimed that the method had been used for ages to safeguard their illegal trade.
He said the practice of keeping a bullet served as a warning to the buyer to keep their mouths shut.
He said most of the gun buyers were members of secret societies.