On 24 September 2007, CAD commenced money-laundering investigations against Ong Tian Soon for allowing his bank account to be used by a syndicate running a phone lottery scam.

Ong Tian Soon, a 28-year-old jobless man, was offered $150 a month to turn his POSB Bank account into a conduit for the transfer and withdrawal of criminal proceeds. He had earned this "fee" just once when he was nabbed.

Investigations revealed that a man identified only as Xiao Zhang approached Ong in Geylang in August 2007. Xiao Zhang offered Ong money for every account that could be used by his syndicate to collect payment from punters placing illegal online bets on games such as soccer. Ong agreed to the terms and allowed his bank account to be used by Xiao Zhang. Subsequently, Ong’s account was used to receive money from victims of a phone lottery scam instead.

Victims of such scams were told in phone calls that they have won "lottery prizes". But to collect the prize money, they had to first transfer money for "taxes" or "administration fees" into a bank account. These unsuspecting victims made transfers to the bank accounts, one of which belonged to Ong. Between 31 August 2007 and 22 September 2007, Xiao Zhang withdrew $8,340 that had been deposited into Ong’s account.

On 5 February 2008, Ong pleaded guilty to a charge of assisting a criminal syndicate to retain benefits from criminal conduct under Sec 44(1)(a) of the Corruption, Drug Trafficking and Other Serious Crimes (Confiscation of Benefits) Act, Chapter 65A. He was sentenced by the Court to 1 year imprisonment.