Anybteicks for finding a person's real bday
or confirming it?

There was one conjurer I hid my name and birthday from. However, his spirit knew my name and location before he bound it to the vessel. So in many cases the spirit knows everything about you already. Whether it chooses to tell the conjurer I have no idea what his or her communication is like.

If you are in communication with the caster, there is a link between you and them already. In the case let's say you wanted healing for a cousin twice removed, then a conjurer may need name and dates, because you very well could have two sick cousins, one who you know, one you may not.

When I read a post, I have a sense of who you are. All I have to do is focus on the post, the perceived persona, and we are connected. Casters on the internet are more advanced then me of course.