In 2016, Singapore moved to shut BSI Bank’s local operation after 1MDB-linked accounts moved hundreds of millions of dollars through private-banking structures, and Switzerland’s regulator said the 143-year-old Lugano bank had treated suspicious wealth like a premium client relationship

In 2016, Singapore did something it had not done to a bank in more than three decades. It moved to shut BSI Bank’s local operation after 1MDB-linked money had passed through private-banking structures in sums large enough to make a Swiss regulator describe the client group as one of the bank’s biggest and most profitable relationships.

BSI was not a fly-by-night offshore shop. It was Banca della Svizzera Italiana, a Lugano private bank founded in 1873, old enough to have lived through two world wars, the end of Bretton Woods, the rise of offshore wealth management, and the 2008 financial crisis.

What finally erased it as a standalone name was not a bank run. It was a compliance failure that had become institutional.

According to the Swiss Financial Market Supervisory Authority, BSI handled 1MDB-linked relationships and transactions for years without properly clarifying why hundreds of millions of dollars were moving through accounts tied to sovereign wealth funds, politically exposed clients, and intermediate structures. The bank made money while the warning signs accumulated.

The bank that kept taking the money

BSI’s Singapore operation sat inside one of the most important financial corridors of the 1MDB scandal. Money connected to Malaysia’s state investment fund moved through accounts, offshore vehicles, private bankers, and correspondent systems that turned public funds into paper trails of loans, gifts, investments, and transfers.

The central figure around much of the wider scandal was Jho Low, the Malaysian financier accused by US prosecutors of helping orchestrate the looting of billions from 1MDB. Low had no official position at the fund. He has denied wrongdoing through representatives, remains a fugitive, and has never been tried in the United States.

The US Department of Justice described the broader 1MDB affair as a massive kleptocracy case, alleging that more than $1 billion in assets subject to its 2016 forfeiture action were bought with money misappropriated from the Malaysian fund. In that early US action, prosecutors traced money into luxury real estate, art, a private jet, and Hollywood financing, including assets connected to The Wolf of Wall Street.

BSI’s role was narrower but institutionally cleaner to read. It showed what happens inside a private bank when the client relationship becomes more important than the question of where the money came from.

FINMA later said BSI had business relationships with a range of sovereign wealth funds whose accounts were booked in Singapore and Switzerland. That client group was, in the regulator’s words, the bank’s largest and most profitable.

The warning signs were not subtle

The red flags were not hidden in a single forged document or an obscure back-office file. They were visible in the size, speed, structure, and explanations attached to the money.

FINMA found that between 2011 and April 2015, BSI had serious shortcomings in identifying high-risk transactions. Those failures included relationships with politically exposed persons, assets whose origins were not sufficiently clarified, and dubious transactions involving hundreds of millions of US dollars.

The bank repeatedly failed to keep the documentation required for high-risk transactions. It also failed to monitor a client group with around 100 accounts, even as money moved inside that group and out to third parties without adequate clarification of the commercial reason.

Some explanations should have stopped the machine. In one case cited by FINMA, a $20 million deposit was accepted as a gift. In another, more than $98 million was credited to an account without sufficient effort to clarify the commercial background.

The most revealing detail was not the largest number. It was the kind of sentence that escapes from inside a bank only when someone, somewhere, still understands what compliance is supposed to mean.

In 2012, according to FINMA, one BSI employee told management: “My team is implementing these transactions without really knowing what we are doing and why and I am uncomfortable with this.” FINMA said no further action was taken by the bank in response.

How private banking turns opacity into service

Private banking sells discretion as a feature. For legitimate clients, that can mean privacy, estate planning, and cross-border asset management. For a bank handling politically exposed wealth, the same machinery can become a way to make the person behind the money harder to see.

FINMA said BSI supported the development of specially created intermediate structures for sovereign wealth fund assets. The stated aim was greater confidentiality for investment activity. The practical result was that BSI could not determine how those assets were ultimately invested.

That is the quiet mechanics of the scandal. The money did not have to arrive in a sack or a suitcase. It arrived through accounts, contracts, loan explanations, intra-group transfers, and shell structures that made each movement look like one more administrative step.

The DOJ’s 1MDB filings described the wider pattern in more cinematic terms. Money allegedly misappropriated from the Malaysian fund helped finance high-end properties, artwork, a private jet, and film production, all of it routed through legal entities and bank accounts that put distance between public money and private luxury.

But inside BSI, the more important trail was internal. FINMA said senior management did not question why sovereign wealth funds would use a private bank for institutional services while paying excessive, out-of-market fees.

The bank’s relationship managers had every incentive to keep the accounts alive. FINMA said the profitability of the client group was reflected in the remuneration paid to the employees involved, and that the relevant client advisor was one of the bank’s top earners.

The Singapore order that broke the brand

On 24 May 2016, the Monetary Authority of Singapore announced action against BSI Bank’s Singapore operation. The regulator said it had served notice of its intention to withdraw the bank’s status as a merchant bank in Singapore, citing serious breaches of anti-money-laundering requirements, poor management oversight, and gross misconduct by some staff.

The fine was not the largest number in the 1MDB scandal. Singapore’s penalty against BSI was about S$13 million. The more serious punishment was the end of its ability to keep operating there as before.

At the same time, FINMA announced its own enforcement result in Switzerland. The Swiss regulator ordered BSI to disgorge CHF 95 million in illegally generated profits and approved the takeover of BSI by EFG International on the condition that BSI would be fully integrated and then dissolved.

That condition turned a compliance failure into a corporate ending. BSI’s clients and staff would be moved into a rival. The name itself would not survive as an independent institution.

FINMA also said none of the BSI top managers responsible for the misconduct would be allowed to take leadership positions at EFG. It opened proceedings against two former top managers to determine what they knew and how they behaved.

The regulatory record did not describe a bank tricked by one impossible client. It described a management culture that was repeatedly told about risk, repeatedly saw suspicious indicators, and repeatedly chose to keep financially lucrative relationships alive.

The prosecutions kept moving outward

The BSI action was only one chamber of the wider 1MDB machine. The US Department of Justice continued pursuing assets and criminal cases. Singapore, Switzerland, Malaysia, and the United States each handled different parts of the scandal through banking penalties, asset seizures, forfeiture actions, and prosecutions.

Goldman Sachs became the most famous institutional defendant. In 2020, the US Department of Justice announced that Goldman would pay more than $2.9 billion in a coordinated resolution over its role in underwriting about $6.5 billion in 1MDB bond deals. Goldman Sachs Malaysia pleaded guilty to a conspiracy charge under the Foreign Corrupt Practices Act.

Goldman also reached a $3.9 billion settlement with Malaysia. The bank’s former Southeast Asia chairman, Tim Leissner, pleaded guilty in 2018 and was sentenced in 2025 to two years in federal prison.

Former Malaysian prime minister Najib Razak was convicted in 2020 in a case linked to SRC International, a former 1MDB unit, and began serving his sentence in 2022. In 2024, Malaysia’s pardons board reduced his 12-year sentence to six years and cut his fine, a decision that kept the political afterlife of 1MDB alive long after the first regulatory orders.

Jho Low remains outside a courtroom. In 2018, US prosecutors unsealed charges accusing him of conspiring to launder money and violate the FCPA. In 2026, the Wall Street Journal reported that he had sought a US presidential pardon while still a fugitive.

By then, many of the objects had changed hands. Art had been forfeited, properties had been seized or sold, and settlement money had been returned. The bank that let suspicious wealth look like private-client business no longer existed under its old name.

What stayed behind after BSI disappeared

The BSI case is not remembered because its fine was the largest. It is remembered because the punishment reached the institution’s body, not just its balance sheet.

A CHF 95 million disgorgement could be booked. A Singapore penalty could be paid. But forced integration into EFG meant the old bank name, the 143-year-old Lugano identity, and the independent franchise all became part of the cost of the relationship.

The private-banking logic was simple until it failed. A large client group brought assets, fees, status, and bonuses. The compliance questions arrived as friction.

Then the regulators wrote the ending in the language of supervision: inadequate risk management, insufficient clarification, poor documentation, weak controls, and a lack of critical attitude at the top. Those words are dry, but they describe a bank watching hundreds of millions move through its own pipes while deciding, transaction by transaction, not to look hard enough.

Seventeen years after 1MDB was created, BSI is no longer standing on its own. The accounts have been closed, the brand absorbed, the case files archived, and the old Lugano bank survives mostly as a name inside enforcement releases. The money moved faster than the warnings, but the residue stayed behind in the one place a private bank cannot hide it forever: its own name.