Marks and Spencer has apologised after some shoppers were sent parcel tracking details that didn’t belong to them.
Some customers of the posh supermarket said they were sent locations and photographs of online orders that were placed by other people.
Others said they had continued to receive dozens of messages from M&S after their package had arrived.
One person told the BBC he got more than 100 text messages sent to him in error by Marks and Spencer.
"Someone could have used that information to drive around and pick all those parcels up," the 28-year-old, known only as Tom from Essex, told the news giant.
"I kept getting loads of messages at once. There's over 100 texts and I had a few two days after I rang up and told them about it," he said.
Tom said no names, numbers or card details were included in the text messages - however, he was sent the GPS coordinates of where parcels were delivered.
He also received images of some people's parcels that had been left outside their doorsteps.
Another shopper tweeted: "I’ve been getting hundreds of delivery, track and divert text messages for other people's @marksandspencer parcels for the last few days. Can someone sort please?"
Were you sent messages by M&S in error? Let us know: mirror.money.saving@mirror.co.uk
A second said: "What is wrong with your text messaging system?? I placed an order with M&S (one order only) and I have received over 80 text messages telling me it has been delivered, it hasn’t been delivered…..etc!!!!
"Order has been delivered but the messages haven’t stopped."
A third added: "Just had 35 texts in less than a minute re delivery of a single parcel that’s due on Monday giving me 35 different delivery times on Mon/Tue. You’ve got a gremlin in your system."
M&S said only 1% of customer orders were affected by the apparent technical glitch - but it didn't specify exactly how many people.
A spokesperson said: "Due to a technical error, a small number of customers received incorrect text notifications."
The spokesperson added: "The issue was quickly identified and resolved. We're apologising to [the customer] for the inconvenience caused."
In more supermarket chaos for shoppers, some Morrisons customers were left unable to place online orders last week following a technical glitch.
Some people say they were asked to re-enter their card details several times, only to get a message saying their payment was declined and their order didn’t go through.
In some cases, shoppers say they received a "payment declined" message after placing an order - and even after their shopping was delivered.
The issue only affected online shoppers - not customers who were shopping in stores at their local Morrisons.
