I know the short answer to this question is "no", but sometimes there are ways around that, like using different capitalisation. I tried just changing the capitalisation here, but it didn't work. Is there another way?
Basically the problem is that my parents (like many baby boomers) share an email address, as do my grandparents. So my mom and grandma are WikiTreers but there's no way of inviting my dad and grandpa so that I can add their DNA tests back to the site.