Target is ending its price match guarantee, further eroding customer trust and pushing shoppers to Amazon and Walmart that have the competitive edge in prices.

Target is ending a price matching policy that for 12 years allowed customers to request a price match if they found an identical item with a lower cost at competitors Amazon or Walmart. The policy enabled a price match if shoppers could provide proof of the lower price within 14 days of their purchase.

After more than a decade of promising “unbeatable value,” Target is walking back one of its most customer-friendly policies. Starting July 28, the retailer will no longer price match Amazon or Walmart — ending a 12-year run that allowed shoppers to snag the lowest price if they could prove a better deal elsewhere.