Red FlagsApril 21, 2026

Money Laundering Red Flags: What Nigerian Banks Must Watch For

A practical, compliance-ready checklist of money laundering red flags across five categories, drawn from CBN, NFIU, and FATF guidance.

Customer Behaviour Red Flags

⚠Customer is reluctant or refuses to provide identification or source of funds documentation
⚠Customer appears nervous or evasive when asked about the nature of their business or transactions
⚠Customer presents conflicting information across different interactions
⚠Customer is unfamiliar with basic details of the transaction they claim to own
⚠Customer is accompanied by someone who appears to be directing their actions
⚠Customer's lifestyle or assets appear inconsistent with their declared income or occupation

Transaction Red Flags

⚠Multiple cash deposits just below the ₦5M CTR threshold (structuring / smurfing)
⚠Large cash deposits followed immediately by international wire transfers
⚠Round-number transactions that lack a clear business rationale
⚠Multiple transactions to the same beneficiary via different channels or accounts
⚠Transactions to or from high-risk jurisdictions with no clear business reason
⚠Rapid movement of funds through the account with no residual balance
⚠Wire transfers to or from countries on FATF grey/blacklists

Account Activity Red Flags

⚠Sudden spike in account activity after a period of dormancy
⚠Account used as a pass-through, funds received and immediately withdrawn
⚠Multiple accounts at the same bank receiving funds that are then consolidated
⚠Frequent changes to account signatories or beneficial owners
⚠New account opened and immediately used for large-value transactions

Digital & Crypto Red Flags

⚠Customer regularly transfers funds to crypto exchange platforms
⚠Multiple bank accounts used to fund a single crypto wallet
⚠Crypto withdrawals followed by immediate large cash deposits at different branches
⚠P2P crypto transactions with counterparties in high-risk jurisdictions
⚠Mobile money wallet receives funds from many unrelated senders (mule account pattern)

Business Account Red Flags

⚠Business revenues far exceed what is plausible for the industry or location
⚠Business account used for personal expenses unrelated to business operations
⚠Shell or newly-incorporated company with no clear business activity
⚠Business cannot provide audited accounts or credible financial records
⚠Beneficial owner of business is a PEP or related to a PEP without adequate justification
⚠Invoice amounts to or from trading partners are inconsistent with market prices

What Nigerian Banks Must Do When Red Flags Are Identified

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1. Document the red flag

Record the specific indicator, transaction or customer details, and the date identified. This creates the compliance audit trail.

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2. Conduct enhanced due diligence

Obtain source of funds, source of wealth, and supporting documentation. Do not tip off the customer that an STR may be filed.

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3. Escalate to your MLRO

All red flags must be escalated to the Money Laundering Reporting Officer for a suspicion determination.

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4. File an STR if suspicion is formed

Under the ML(PP)A 2022, an STR must be filed via goAML within 24 hours. Suspicion, not certainty, is the legal test.

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5. Continue monitoring

Even after filing an STR, continue to monitor the account and document subsequent activity.

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Frequently Asked Questions

What are the most common money laundering red flags in Nigeria?

Structuring of cash deposits below CTR thresholds, unusual international wire transfers, customers unwilling to provide source of funds, and transactions inconsistent with known business activity.

Are banks legally required to act on red flags?

Yes. Under the ML(PP)A 2022 and CBN AML/CFT Regulations, banks must escalate red flags to their MLRO and file STRs within 24 hours of forming suspicion.