HSBC has expressed regret that so many UK customers have experienced difficulty using their mobile and online banking services.
Downdetector, a website tracking platform, revealed that more than 4,100 people declared they were unable to access HSBC services.
On Black Friday, there will be many shoppers looking to take advantage of the discounted prices offered by stores.
The bank expressed regret over the inconvenience caused, citing an internal system problem as the cause of the disruption to the BBC.
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HSBC UK customers are the only ones affected - there is no impact to customers of First Direct or M&S Bank, the firm clarified.
Marius Acsinte, aged 34, reported to the BBC that he was unable to access his HSBC account, which led to some complications.
He stated that he was unable to open the application to pay his rent which was due on that day.”
I anticipated that the bank would inform me via text or email of the rationale behind it, but instead I had to learn it online.
No matter whether it's Black Friday or not, I've been unable to use my funds and nobody has apprised me of the reason for this.
Many have voiced their annoyance at not being able to pay with a card online due to their incapability to validate buys with the app.
The firm stated it is possible for those affected to acquire a single-use passcode via SMS.
The number of people impacted by the issues with the bank is uncertain, as users have to check their online banking app to determine if it is functioning properly.
HSBC estimates that around nine out of every ten transactions which take place at the bank are carried out digitally, though the exact number of customers who use mobile and online banking is not known. In the UK, the bank has 14.8 million customers.
The bank declared previously that it would be shutting down 114 branches in the UK by 2023, claiming that the reason was a rise in customers who favor online banking.
The post by HSBC UK on X (formerly Twitter) elicited grievances from users - claiming to be unable to confirm their Black Friday payments or pay bills when payday came.
"I received my salary today, yet cannot take care of any bills! Please look into this, HSBC," one user grumbled.
Others expressed their annoyance over not having the ability to transfer funds between accounts in order to shop online.
Reports of an outage were first brought to light at 07:00 GMT on Friday, as shown by Downdetector, with a great number of complaints arriving by 08:00.
Nevertheless, the bank's service status page, which gives insight into the accessibility of online, mobile and telephone banking, wasn't revised until around 11:00 - a development which was also a source of dissatisfaction for customers.
One person expressed their concern that they would need to move some of their funds due to the lack of communication about the issue since its beginning, adding that the service website had not even been updated.
Conributed by Osob Elmi.
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