Nigerian banks on high alert as year-end digital fraud rises

As the year winds down, Nigerian banks are facing renewed pressure from a famil­iar but increasingly sophisticated threat: a sharp rise in fraud activities tied to the surge in digital transactions during the festive season.

From online shopping and instant transfers to USSD payments and mobile banking, the final quarter of the year — especially December — has become peak season not only for commerce, but also for cybercrime, reports Daily Independent.

Industry experts say criminals delib­erately target the year-end period when transaction volumes spike, customers are distracted by holiday activi­ties, and businesses rush to close accounts, settle invoices and pay bonuses.

The result is a dangerous mix of high digital activity and reduced vigilance, conditions that fraudsters exploit with precision.

Digital Growth, Expanding Attack Surface

Nigeria’s banking sector has made major strides in digitisa­tion, driving financial inclusion and transaction efficiency. Mo­bile apps, internet banking and PoS terminals now dominate everyday payments. However, this rapid shift has also expand­ed the attack surface for fraud­sters, who increasingly rely on technology-driven schemes rather than traditional physi­cal theft.

Banks report that attempted fraud cases typically rise sig­nificantly in the fourth quar­ter, with December recording the highest volume.

Criminals take advantage of increased cash flows from salaries, fes­tive bonuses, remittances and seasonal spending to execute scams that often succeed be­fore victims realise what has happened.

According to banking in­dustry sources, Nigerian banks lose billions of naira annually to cyber-enabled fraud, with a disproportionate share of loss­es recorded at year-end despite heavy investments in security systems and customer educa­tion.

Common Year-End Fraud Tactics

The tactics used by fraud­sters have evolved, becoming more personalised and psycho­logically manipulative.

Phishing and smishing remain among the most com­mon schemes. Fraudsters send emails or SMS messag­es disguised as urgent bank alerts, delivery notifications or holiday promotions, luring victims into clicking malicious links or providing login creden­tials.

During the festive season, these messages often reference discounts, travel deals or lim­ited-time offers, making them appear legitimate.

Social engineering scams are also on the rise. In these cas­es, criminals impersonate bank staff, fintech support agents or even law enforcement officials, persuading customers to au­thorise payments or disclose one-time passwords (OTPs). Because the victim technically approves the transaction, recov­ery becomes difficult.

Account takeover fraud has become more sophisticated, often involving SIM swaps or stolen credentials. Once access is gained, fraudsters can drain accounts within minutes, especially during periods of high transaction activity when abnormal behaviour may go unnoticed.

Business Email Compro­mise (BEC) has emerged as a growing threat to corporates. Fraudsters impersonate senior executives or vendors, sending convincing emails that instruct finance teams to divert pay­ments to fraudulent accounts. Year-end account closures and audit pressures make business­es particularly vulnerable.

Another rising risk is syn­thetic identity fraud, where criminals create fake identities by combining real and fabri­cated data. These identities are then used to open accounts, ob­tain credit or move illicit funds, often evading detection for long periods.

Why Year-End Is High Risk

Several factors make the final quarter of the year espe­cially attractive to fraudsters.

First is increased digital ac­tivity. Online shopping, mobile transfers and electronic bill payments all surge during the holidays. Higher volumes cre­ate noise that can mask fraud­ulent transactions.

Second is distraction. Con­sumers and businesses are often preoccupied with travel plans, celebrations and dead­lines, reducing the level of scru­tiny applied to messages, emails and transaction prompts.

Third is the rise of holi­day-themed scams. Fraudsters cleverly incorporate festive language, seasonal promotions and end-of-year urgency into their schemes, making them harder to detect.

Economic pressure also plays a role. In a challenging economic environment, both individuals and businesses may be more susceptible to of­fers that promise quick gains, discounts or urgent problem resolution.

Impact On Banks

For banks, the consequences are significant and multifacet­ed. Rising fraud losses directly impact profitability, as insti­tutions are often required to reimburse affected customers. Beyond the financial hit, banks face higher operational costs from investigations, system up­grades and customer support.

There is also reputational risk. In an era of social media, a single fraud incident can quickly escalate into a public re­lations crisis, eroding customer trust and confidence in digital banking channels.

Operationally, banks experi­ence a surge in fraud alerts and case volumes during year-end, placing additional strain on risk management and custom­er service teams. Fraudsters also probe system vulnerabili­ties, testing limits and exploit­ing any weaknesses exposed by high transaction loads.

Regulatory And Industry Response

Regulators, led by the Cen­tral Bank of Nigeria (CBN), have intensified oversight of fraud risk management. Banks are required to strengthen Know-Your-Customer (KYC) processes, improve transaction monitoring and collaborate more closely on fraud intelli­gence.

In response, many banks have deployed advanced an­alytics and artificial intelli­gence-driven systems capable of detecting suspicious pat­terns in real time. Multi-factor authentication (MFA), biomet­ric verification and stricter transaction limits are increas­ingly being enforced, particu­larly for high-risk transfers.

Interbank cooperation has improved, allowing for faster ac­count freezes and information sharing once fraudulent activ­ity is identified. This collective approach is critical, as crimi­nals often move funds rapidly across multiple institutions.

Human Factor

Despite technological ad­vances, bankers acknowledge that customers remain the weakest link. Social engineer­ing exploits human trust rath­er than system flaws, making it difficult to eliminate entirely.

“Fraudsters are no longer just hacking systems; they are hacking people,” a risk man­agement expert noted. “That’s why customer education is as important as technology.”

Banks have stepped up awareness campaigns toward year-end, warning customers not to share PINs, passwords or OTPs, and to verify any unusu­al requests independently.

How Banks And Customers Can Protect Themselves

Experts say a layered ap­proach is essential.

For banks, this includes enhanced multi-factor authen­tication, faster fraud detection systems, stricter verification for high-risk transactions, continuous staff training and regular stress-testing of digital platforms during peak periods.

According to Tosin Ilebe, a banker, “For customers, vigi­lance is key. Users are advised to be sceptical of unsolicited messages or offers, avoid click­ing unknown links, use strong and unique passwords, enable MFA and monitor accounts closely for unusual activity’.

Beyond The Festive Season

While fraud peaks in De­cember, analysts warn that the threat does not disappear in January. As Nigeria’s digital economy continues to expand, fraud risks will remain a con­stant challenge.

“For Nigerian banks, the year-end fraud spike is both a test of resilience and a re­minder that securing digital channels requires constant adaptation. As criminals grow smarter, the battle against fraud will increasingly be won not just with technology, but with awareness, speed and collective vigilance”, Anor Anyanwu, a former bank chief, said.