How do you contact the chapter regarding COR?
 

Hi,
When the chapters don't make it public that they're doing COR, how are the PNMs supposed to know that they might give you a snap bid or something?
Do you individually have to go contact the recuitment chair and ask? or do you have to know a sister or something?

It might be different in every school but how does it work in general?

When chapters don't make it public that they are doing COR it is usually because they already have a "list" that they are considering and they have limited spots. COR is kind of like dating, if a group likes you and wants to offer you a bid they will contact you.

It might not hurt to email or call the Recruitment chair and say that you are interested in joining a sorority, and if she would be able to give you any information.

However, if you don't get a response, then what lauradav told you probably applies in this case.

I would advise contacting your campus' Greek Life Office. Panhellenic Council will have a list of the sororities who are participating in COR. They may even be accepting applications for COR which they will give to all of the sororities who are participating.