Lam Chun-yin, 32, a former customer relationship manager at China Construction Bank (Asia), has been sentenced to four years in prison after pleading guilty to accepting cryptocurrency bribes to authenticate fake standby letters of credit.
Between April and June 2022, Lam received more than $470,000 in Tether (USDT) in exchange for falsely verifying several documents. The forged letters of credit and collateral documents falsely claimed to have been issued by CCB and totaled over $1.6 billion. At the time, Lam worked in retail banking for individual customers and was not authorized to handle commercial credit facilities or issue letters of credit.
Connection to Vesttoo Investment Platform
The fraudulent documents were linked to transactions involving Vesttoo Limited, a financial technology company operating a platform for insurance-linked investments. Investors on the platform were required to provide bank-issued standby letters of credit as collateral. After Yu Po Holdings became an investor, a group arranged for Lam to act as the CCB contact responsible for verifying the documents, which he then falsely authenticated.
The scheme was uncovered during an internal investigation by CCB (Asia), which determined that neither the bank nor its affiliated companies had issued any of the letters of credit or collateral documents involved in the case.
Court Ruling and Broader Concerns
District Court Judge Ernest Lin Kam-hung sentenced Lam to four years in prison and ordered him to repay approximately HK$3.7 million, equivalent to the value of bribes received. The judge stated that deterrent sentences remain necessary even for first-time offenders because the case affected Hong Kong's banking and insurance sectors and could damage the city's reputation as a global financial center.
Lam faced an additional charge involving the use of false instruments, but the court left that charge on file and did not proceed with it.
Hong Kong's Independent Commission Against Corruption (ICAC) has warned that corrupt groups are increasingly using cryptocurrency to conceal illicit payments. The agency has obtained arrest warrants for other individuals connected to the case.


