Why do some coin-operated machines not accept certain coins?
Since 2001, the Royal Canadian Mint has produced coins using the multilayer plating process. The new plated coins have a special electromagnetic signal for vending machines, which meant that some vending machines required a software upgrade. In 1999, the Mint issued test coins throughout the industry to assist in the upgrading process. Canadians in some regions may still experience difficulty with the new coins as a result of machines that have not yet been upgraded or recalibrated. However, this problem is encountered less and less frequently owing to ongoing testing and adjustments, and by 2004, approximately 90% of all vending machines in Canada were upgraded.
