Visa has partnered with most banks to offer debit cards within Australia. It is also a major provider of credit cards around the world, so Visa debit cards can be used at more than 29 million locations in 170 countries worldwide. Many people have an existing relationship with Visa as they already hold a credit card supplied by Visa and are used to using one at retail outlets. Visa also has in place strict security measures to protect cardholders, including Verified by Visa. The company also works together with the banks to ensure the best possible security for cardholders.