Why do I receive multiple two-step verification (2SV) passcodes?

Question

What are reasons I might get more than one two-step verification passcode upon sign in?

Answer

Two-step verification (2SV) relies on browser cookies. Your customers or agents must enter a 2SV passcode when:

Users sign in on another device, such as a second laptop

Users use another browser on the same device, such as Chrome, Firefox, or Safari

Users clear cookies manually or when they exit the browser

For example, Microsoft Edge settings may show Clear browsing data on close, or they use a private or incognito window