wp-signup.php blog_id

Hello people,

I’m trying to check the originating blog_id in wordpress network mode after redirection to wp-signup.php page.

Can’t figure out where the originating blog_id is stored. When blog_id is called from wp-signups.php it always returns 1. The main blog.

Trying to implement registration validations that are stored in each blog options table. Without correct blog_id these validations fail.

The signups table (meta field) before pre user activation is empty. Sorry if I’m saying something silly but I get the impression that the blog_id is stored on the activation key and it’s the key that assigns the user to the correct blog ÔÔ

Can a guru advise?