article_snippet.sent: Experts fear the problem could become even worse when the new 12-sided pound coin is released in 2017.
article_snippet.sent: The 5p and 10p pieces introduced three years ago are slightly thicker than the old ones, which means that a considerable number of machines still reject The 5p and 10p pieces .
article_snippet.sent: But a sticker says a sticker will not accept the new silver coins.
article_snippet.sent: the new silver coins were introduced in 2012 by the Royal Mint and since then, 330million are in circulation while older copper-nickel coins have been steadily recalled.
article_snippet.sent: The 12-sided coin, which resembles a classic threepenny bit, was announced as a way to fight a surge in the number of £1 in circulation - a racket that costs the economy
article_snippet.sent: Jonathan Hilder, CEO of the Automatic Vending Association, estimated that forgeries make up some 3.03 per cent of the more than 1.5billion £1 coins in circulation.
article_snippet.sent: Jonathan Hilder, CEO of the Automatic Vending Association said that increasingly sophisticated technology meant that coins were easier to fake - and that 50 per cent of these counterfeit coins successfully passed through vending machines.
article_snippet.sent: The new coin  will be made from two types of metal, like the current £2 coin.
article_snippet.sent: Coun Luthfur Rahman, the council's assistant executive member for environment, said: 'Coun Luthfur Rahman, the council's assistant executive member for environment are in the process of re-calibrating all the pay and display machines to accept the new 5p and 10p coins. '
highlights_snippet.sent: Experts fear problem may get worse when new £1 is introduced in 2017 .