How Long Can I Stay in the USA on an F-1 Visa?

Visa Europe temporarily blocked iZettle from processing Visa card payments in Denmark, Finland, and Norway in August 2012. This decision stemmed from concerns that iZettle's mobile card reader did not meet Visa's security standards. Specifically, iZettle's device used an electronic signature for transaction authentication, whereas Visa required the use of a PIN for such transactions.

In response to this issue, iZettle introduced a secure redirection method, allowing Visa cardholders in these countries to complete payments via a separate, Visa-approved secure web page on their smartphones. This workaround restored Visa acceptance, though it was less convenient compared to earlier methods.

By February 2013, iZettle launched a new chip-and-PIN card reader that complied with Visa Europe's security requirements, fully resolving the dispute and reinstating seamless Visa support.

In summary, the dispute arose due to differences in security protocols between iZettle's authentication method and Visa's requirements. The issue was amicably resolved through technical adjustments, enabling iZettle to continue offering Visa card payment services in the affected countries.