Does www difference cause registration error?

Tl:dr: If your button code is for http://mysite.com but your site uses htaccess to force http://www.mysite.com, would this prevent people from being able to register after they pay?

Full story:

So I was using Cloudflare on my site, which forces all urls to resolve to http://site.com instead of http://www.site.com. I decided I didn’t like it and got rid of it.

After I got rid of Cloudflare, two members registered for my site. I saw their paypal confirmation email but no membership registration email. I sent them an email to inquire and they said that they had paid and then not been given the option to register. The first time, I figured it was a problem on the user’s end, but when it happened twice, I knew there was an issue with my site.

I went back to my button code and realized the button code was set for http://mysite.com even though htaccess forced my site to resolve to http://www.mysite.com. I updated the button code to be http://www.mysite.com and am hoping that that fixes the issue.

However, I’d like confirmation that having the button code set for http://mysite.com could indeed be responsible for this error. I don’t want any more users to pay and be unable to register, so if I did not correctly find the source of the error, then I will need to keep troubleshooting. Could anyone clarify this for me?

It’s important that you are consistent with the user or not of www, so it could be what caused your problem.
Knowledge Base » Don't mix www and without

Let us know if that fixes it. :)