AML/CFT — Suspicious Transaction Reporting (STR) & Tipping-Off
Concept
When an FA knows or has reasonable grounds to suspect that property is connected to criminal conduct or terrorism financing, it must file a Suspicious Transaction Report (STR) with the Suspicious Transaction Reporting Office (STRO) under the Corruption, Drug Trafficking and Other Serious Crimes (Confiscation of Benefits) Act (CDSA). Separately and just as important, the FA must not tip off — disclosing anything likely to prejudice an investigation is a criminal offence. These are two distinct duties: a positive duty to report and a negative duty to stay silent.
Key rules & facts
- Legal basis: the STR obligation arises under the CDSA; terrorism-financing suspicions are also reportable (under the TSOFA — Terrorism (Suppression of Financing) Act). Reports go to the STRO, which sits within the Commercial Affairs Department (CAD) of the Singapore Police Force.
- Threshold to report: knowledge OR reasonable grounds to suspect — you do not need proof that a crime occurred, and you do not decide guilt.
- Timing: file as soon as reasonably practicable after suspicion is formed (verify: exact statutory timeframe/prescribed form — filed via the STRO's electronic filing system, e.g. SONAR).
- STR ≠ CDD: filing an STR does not by itself discharge CDD obligations, and CDD/monitoring must continue as appropriate.
- File regardless of outcome: report whether the transaction proceeds, is aborted, or is only attempted.
- Tipping-off: do not disclose that an STR was or will be made, or reveal information likely to prejudice an investigation. Keep filings confidential on a strict need-to-know basis. Note: making ordinary CDD enquiries is permitted, but doing so in a way that signals a report is being made can breach the tipping-off prohibition.
- Internal process: front-line staff typically escalate to the AML/CFT compliance officer / MLRO, who assesses and files; maintain records of both reports made and decisions not to report.
- Red flags: no apparent economic or lawful purpose; reluctance to provide CDD; use of nominees/third parties to obscure identity; funds inconsistent with the customer's profile; structuring to stay below thresholds; links to higher-risk jurisdictions; unusual urgency or secrecy.
Key data — STR process steps
| Step | Action | Watch-out |
|---|---|---|
| 1. Detect | Identify a red flag / suspicious activity | Suspicion, not proof, is enough |
| 2. Escalate | Report internally to compliance officer / MLRO | Keep need-to-know |
| 3. Assess | MLRO evaluates the grounds for suspicion | Document the decision either way |
| 4. File | Submit STR to STRO via prescribed channel (e.g. SONAR) (verify) | File as soon as reasonably practicable |
| 5. Maintain | Keep records; continue CDD/monitoring | STR does not satisfy CDD |
| 6. Stay silent | Do not tip off the customer or third parties | Tipping-off is a criminal offence |
| Duty | What it requires | Offence if breached |
|---|---|---|
| Report (STR) | File on reasonable suspicion, to STRO under CDSA | Failure to report |
| Do not tip off | Keep the report and investigation confidential | Tipping-off |
Exam angle
Combination of recall (report to the STRO, under the CDSA; TF also under TSOFA) and situational judgment (spot the red flag; report on suspicion not proof; never warn the customer). Expect a scenario where you must both decide to file and avoid tipping off.
⚠ The trap
Believing you need proof or a completed crime before reporting (only reasonable grounds to suspect is needed); or "helpfully" asking the customer to explain the transaction in a manner that reveals a report is being made — that is tipping-off. Also: assuming that if the transaction was aborted there is nothing to report (still reportable).
Worked example
A customer wires funds in several amounts just under a reporting threshold, then abruptly cancels when asked for documents. The FA should not tell the customer "we have to report this," must escalate internally and file an STR with the STRO on the basis of reasonable suspicion (structuring), and continue normal handling without alerting the customer — regardless of the cancellation.
Takeaway
Suspect it, report it to the STRO under the CDSA — and never tip the customer off.
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