McGrath. Only one registration is needed. Having more that one is a bad plan - it can cause confusion as well as meaning 2 sets of PMs may need checking, etc.

Memberhip details are held in a database at Mudcat. The system here makes use of a cookie to identify you. All it really does is sends your memberID number to Mudcat each time you ask for a page here and a memer needs to ensure they are logged on. Some systems, particularly work ones where it may be part of a security policy will block cookies. In those cases, mulitple memberships will not help matters. No cookie - no membership - simple as that.

I take an alternative approach. Guest posts where allowed are actually posted to a special member account called "Guest Account". All other posts and things such as a PM require a username and password which are supplied automatically to a logged in member. I'm not convinced it is as secure as the memberID here as a form containing username and password could be left in browser's cache (user responsobility IMO) but it does mean a member can post or check/ reply to PMs even on a system that blocks cookies.

Jon