If you need to have multiple Brex accounts, but only have one email address, you will need to use an email alias. If you use Gmail or Outlook, you're able to have a second invitation sent to the same email address by adding a plus sign (+) and an additional character(s) after the plus sign:
Using the example above, firstname.lastname@example.org will be treated as a new user at Brex and they will receive emails at the original email address' inbox (email@example.com). By using different aliases, you’ll be able to have multiple user accounts with the same email address. Please ensure that your email provider is able to support such aliases.