An account holder with the Guaranty Trust Bank (GTB) Onifade Isaac, has said that the sum of N4.6m was fraudulently transfered from his account with the GTB through to an unauthorised transaction without receiving any Short Message Service (SMS) alert notifying him of the transaction.
The incident, which occurred on August 22, 2026, has renewed public concern over the reliability of mobile banking security alerts as more Nigerians report silent, unauthorised debits from their accounts.
According to Isaac, who resides in the Alimosho area of Lagos State and works as a warehouse manager, the sum was moved from his GTB savings account through the bank’s mobile app to a Pocket App account bearing the name Zahara’u Iliyasu.
“On the 22nd of August 2026 at 11:49 am, the sum of N4.6m was fraudulently moved out of my account through the GTB Mobile App,” he said.
“I did not know of this transaction until evening when I needed to withdraw a small amount of money to settle a family need, and I was told I had insufficient balance,” he added.
Isaac further explained that he only discovered the fraud after checking his account independently, as no notification had been sent to him at the time of the transaction.
“I wasn’t sent any SMS alert for that transaction. Immediately after I noticed, I called GTBank customer service, being a weekend, to notify them,” he stated.
He added that the bank’s customer service team acknowledged the report and gave instructions to block both his account and the recipient’s account, in addition to placing a “Do Not Debit” order on the receiving account.
“It was acknowledged with instructions to block my account as well as the recipient account, and place a Do Not Debit on the recipient account,” he said.
However, Isaac said that when he visited the bank in person the following Monday, he was informed that despite the block, the funds had already been withdrawn.
“I went straight to my bank to ask them if they had blocked the account and the recipient account, which they said yes, it has been done. After some days, I was told that the funds had been utilised by the recipient,” he added.
Isaac made available to The PUNCH documents to support the claim. They include an affidavit deposed at the Chief Magistrate Court of Lagos State, Yaba Magisterial District, dated August 26, 2026, in which he stated under oath that Guaranty Trust Bank “completely failed to send me an implied/mandatory One Time Password to authorise this mobile app login/transfer, nor did I receive any SMS transaction alert despite my phone network being fully active and in my possession.”
The affidavit further sought “an immediate reversal”.
Police extract from the crime diary of the Nigeria Police Force, dated Thursday, August 27, 2026, corroborates the account, recording that Isaac reported to the station with the affidavit and stated that the bank failed to send him an OTP or an SMS transaction alert, despite his phone network being fully active and in his possession.
An email response from GTB’s E-Fraud, Analytics and e-Channel Security Group, sent on August 22, 2026, the same day as the incident, appeared to confirm that action had been taken.
“Please be informed that your account has been blocked to prevent unauthorised access to your account,” the bank’s representative, Hannah Oguntade, wrote.
“The debit has been escalated to the receiving bank,” she added.
A bank statement covering the period August 1 to August 24, 2026, shows the account’s closing balance fell to N10,446.86, from an opening balance of N4,395,275.11, with a single outward transfer of N4,600,000 recorded on August 22, 2026, described in the statement as an “Outward Transfer to Pckapp – Zahara’u Iliyasu.”
The record shows the transaction effectively wiped out the account’s entire standing balance in one transfer
