According to the BBC, NatWest, a bank, has received hundreds of requests for copies of personal data under data protection laws.
It comes after an argument between the group and Nigel Farage, a supporter of Brexit.
The former head of UKIP claims that his account at Coutts, a NatWest-owned private bank, was closed down as a result of his political beliefs.
It's unclear if current or former customers submitted the requests.
Mr. Farage was not given a reason why Coutts decided to close his account.
Later, Mr. Farage asked for a copy of the data the bank had on him.
A subject access request is what it is known as in data protection law.
Minutes from a meeting in November of last year where his suitability as a client was discussed were included in a document he obtained.
Given his "publicly stated views," it was stated that keeping Mr. Farage as a client would be inconsistent with Coutts' "position as an inclusive organization.".
It alluded to Mr. Farage's retweet of a transphobic joke by Ricky Gervais as well as his friendship with tennis player Novak Djokovic.
It cited a number of instances to highlight concerns that he was "xenophobic and racist," including his comparison of Black Lives Matter protesters to the Taliban and his description of the RNLI as a "taxi-service" for unauthorized immigrants.
The reputational risk of having Mr. Farage as a client also worried Coutts.
Dame Alison Rose, the chief executive of NatWest, has since expressed regret for the remarks, which she described as "deeply inappropriate.".
Insinuating that thousands of others had also had their accounts closed by NatWest on Thursday, Mr. Farage urged them to submit their own subject access requests.
According to information provided to the BBC, the bank has seen a noticeable rise in these requests.
Instead of thousands, the numbers are believed to be in the hundreds.
How many of those making the requests have had their accounts closed is unknown.