Tesco says if your grocery shopping is cheaper at a rival it will give you a voucher for the price difference - its new Price Promise. Tesco, until very recently, capped this price difference promise at £20.
But its now slashed this to £10, and changed some terms, to the chagrin of some loyal Tesco shoppers it seems.
One shopper going under the name of Kelly Erker on Tesco's Facebook page was expecting a Price Check voucher for £17.92, according to the Mail. "When I went to print it this morning, it takes me to the 'Price 'Promise' site and no voucher. I've noticed that you have now capped the limit at £10."
It's thought fewer than 5% of Tesco vouchers made out are for more than £10. Most are less than £2 according to Tesco. There's also a stipulation that no less than eight separate items have to be bought in order to qualify for the Price Promise.
However, this 'promise' looks weaker when compared with, for example, Asda's offer. Asda's price guarantee claims it will always be 10% cheaper than a rival - and if it isn't it will refund you the difference, plus 10%. Tesco, on the other hand, only matches the price of goods bought from a rival.
So if you spend £200 a month at Asda, Asda claims your monthly shop should, in theory, always be £20 cheaper than Tesco. "If we're not 10% cheaper, we'll refund the difference," said an Asda spokesperson. "The [price comparison] site we operate is monitored by MySupermarket, so it's completely independent."
Meanwhile Morrisons is getting down and dirty in the Voucher War with a £5 off a £40 spend coupon in The Sun newspaper this Sunday. We reported Morrisons U-turn on vouchers last week - previously Morrisons boss Dalton Philips said he wasn't too happy about going down the voucher route.
UK consumers continue to clip: they redeemed the best part of 340 million coupons last year, up from 277 million in 2010, according to voucher services provider Valassis.
10 biggest companies in the world
Tesco slashes Price Promise offer
Wal-Mart Stores, or Walmart, is an American retailer that runs chains of discount department and warehouse stores around the world.
The company was founded by Sam Walton in 1962, incorporated on October 31, 1969, and first traded on the New York Stock Exchange in 1972. It is headquartered in Bentonville, Arkansas and has around 8,500 stores in 15 countries, under 55 different names.
Royal Dutch Shell, more commonly known as Shell, is a global oil and gas company headquartered in Holland, but with its registered office in London.
With operations in more than 90 countries, it is active in every area of the oil and gas industry, including exploration and production, refining, petrochemicals, power generation and trading.
Exxon Mobil Corporation, or ExxonMobil, is an American oil and gas corporation formed on November 30, 1999, by the merger of Exxon and Mobil. Its headquarters are in Irving, Texas.
With 37 oil refineries in 21 countries, Exxon Mobil Corporation is the largest refiner in the world.
BP is yet another global oil and gas company, this time headquartered in London. It has operations in more than 80 countries, produces about 3.8 million barrels of oil per day and has 22,400 service stations worldwide.
The name BP is derived from the initials of one of the company's former legal names, British Petroleum.
Sinopec Group is one of the major petroleum companies in China, headquartered in Beijing.
Its business includes oil and gas exploration as well as the production and sales of petrochemicals and chemical fibres.
China National Petroleum Corporation is a state-owned fuel-producing corporation and the largest integrated oil and gas company in China. It has its headquarters in Beijing.
CNPC - the parent company of PetroChina - was created in 17 September 1988 when the government decided to disband the Ministry of Petroleum and create a state owned company to handle all Petroleum activities in China.
State Grid Corporation of China is the largest electric power transmission and distribution company in China, once again headquartered in Beijing.
It has subsidiaries in Northern China, Northeastern China, Eastern China, Middle China and Northwestern China.
Toyota Motor Corporation, more commonly known simply as Toyota, is a multinational automaker headquartered in Toyota, Japan.
The company was founded by Kiichiro Toyoda in 1937 as a spinoff from his father's company Toyota Industries. Its brands include Toyota, Lexus and Daihatsu.
Japan Post Holdings is a state-owned Japanese company that deals with mail delivery and financial services.
It is headquartered in Tokyo and was founded on January 23, 2006.
Chevron Corporation is an American energy company headquartered in San Ramon, California.
It is active in more than 180 countries and is engaged in every aspect of the oil, gas, and geothermal energy industries, including exploration and production, and power generation.