“The officers narrating the report made by Kmart said that he made the purchase, scanned the FlyBuys and just walked away to the car.
“Kmart staff, noticing that, followed him to the car and took a snap photo of the car registration.”
Singh questioned why staff members hadn’t followed her husband to verify the purchase if they'd allegedly seen him walk out without paying.
During the “embarrassing” questioning by police officers, Singh said her and her husband were asked to provide proof of their purchase.
“Gosh.. We usually don’t print receipts,” she said in the post.
“I calmed down and took a couple of minutes to review our transactions on the card.”
By this point, Singh said the police had been at the front of the family’s house for half an hour.
“(It) was quite embarrassing having the cops present in front of the house interrogating and was drawing a lot attention.”
But soon after, Singh said she was able to find the transaction on her bank’s phone app, proving her husband had paid for the purchase.
“The cops were professional and said that is good enough and we are not in trouble.”
“I am so mad at Kmart Mt Ommaney management team for messing up my weekend and causing me unnecessary mental stress."
Singh, who said her situation would’ve been very different if she didn’t have a banking app, urged shoppers to keep their receipts.
Kmart responded to the post on their Facebook page, apologising to Singh and asking her to contact the department store for an “opportunity to follow up”.
“We’re sorry to hear about your experience with our Mt Ommaney store,” Kmart wrote on the post.
“We can understand how disappointing this situation would have been for yourself and your husband, and we apologise for the inconvenience caused.
“We'd really like the opportunity to follow this up with you.”
Fellow shoppers also chimed in, coming to Singh’s defence and asking what would’ve happened if the situation was different.
“What if somebody had paid in cash?,” one social media user wrote.
“It's not right to do that. They should call and ask or they can just approach you,” another said.
“If he hadn’t paid, then the transaction would still be showing on the machine. Why not check the machine?,” someone else wrote.
“Kmart should pay for the waste of police resources.”
7NEWS.com.au has sought comment from Kmart.