Thousands of customers, restaurants and teenagers were charged twice during the week when they used their credit and debit cards.
Cardnet, which processes card payments in shops and restaurants, has admitted that some card terminals have made double payments due to a computer failure on Wednesday, August 29th.
Lloyds Bank, which owns the payment provider, says that the problem involved less than 5 percent of the transactions.
Glitch: Cardnet has admitted that some card terminals pay double
A mistake with Cardnet's payment processing system meant that thousands of customers using their credit or debit card were charged twice on August 29.
Because the problem was caused by the card processing system, it hit customers of all banks.
The majority of the transactions concerned were Visa debit cards.
What can affected customers do when they are charged twice?
Refunds should be automatically applied and many should already be processed.
But all customers who used their credit or debit card on August 29 at a bank are advised to check their statements.
Please contact your bank if you discover an error and your refund has not been processed.
What does Cardnet have to say about the glitch?
Cardnet said on its website: "Cardnet sincerely apologizes for the problem and the inconvenience. We continue to work closely with all parties to resolve this issue quickly. & # 39;
A Lloyds Banking Group spokesperson said: "A small number of transactions processed by Cardnet last Thursday were duplicated.
& # 39; Action has been taken to remedy this situation as soon as possible and we apologize for any inconvenience. & # 39;
Charged twice? Lloyds Bank, which owns the payment provider, says that the problem involved less than 5 percent of the transactions
Will I hear this from my bank?
Given the size of the glitch, banks should give advice to their customers explaining what has happened and what they should do if you are concerned about a double payment. If that is not the case, contact them and ask them how they can best proceed.
Monzo, a bank that is only mobile, sent a message to its customers explaining the problem: & # 39; When you make a payment, we'll separate the money from your account.
Then, usually, a few days later, the merchant's bank comes along to collect the money. This is the moment when the payment is "settled".
& # 39; Unfortunately, a processing problem in this case meant that some payments were collected twice. & # 39;
How bad are consumers affected by the problem?
Consumers and businesses affected by the payment request have used social media to warn others about the problem.
A Twitter user named Sir Dean Hurrell said he was charged almost £ 550 twice for the mistake.
The hairdressing office Flint in Norwich also exchanged a series of messages on Twitter with Lloyds Bank claiming that all their customers were charged twice on a certain day. Flint claimed that it was Llloyds 'customer service after the incident' very disappointing & # 39; found.
The glitch also causes some confusion for some consumers, where a Twitter user is wondering if a double charge by Tesco for shopping at the weekend was part of the Cardnet debacle.
Full Cardnet statement
Cardnet stated in a statement on its website: "On Friday, September 1, Cardnet became aware of an incident in which the settlement file for transactions carried out by 40 (independent terminal) traders on Wednesday, August 29, was duplicated and the clearing file for transactions on Thursday 30 became August was therefore not submitted.
& # 39; This has caused sellers to receive incorrect settlement amounts based on both the duplicate file and the late payment of Thursday's money. In some cases this has been too large a payment of expected settled funds, in other cases too low a payment.
"Moreover, and more importantly, cardholders (customers) of the traders affected by Cardnet may also have been debited twice for transactions conducted on Wednesday.
The clearing file of both Thursday and the reversal of double transactions has been sent for processing, correcting the issue for traders as part of their settlement of funds from Friday 1 September and reconciling their settlement with what is within two days are expected.
We expect that the refunds to cardholders who have been charged twice will be completed by Tuesday September 4 at the latest.
& # 39; Cardnet sincerely apologizes for the problem and the inconvenience. We continue to work closely with all parties to resolve this issue quickly. & # 39;