Typically, which sheets that are accepted and which are declined are dealt with in the OOC, so it'll be hard to find what you're looking for without scouring the OOC. A few RPs handle the discussion in the character tab, but I feel this is just messy. If you're looking to tell who is accepted, though, most RPs likely have some sort of list of accepted characters in either the 0th or first post in the character tab. Some use it to track applicants, too.

[quote=@PaulHaynek]And you can edit your posts here in RoleplayerGuild. You can just remove rejected characters from your post by editing it. However, if it's posted on the Characters Tab (and not by you), it's there forever.[/quote]

This is true unless the GM contacts a moderator to hide the post. That way no one but the GMs and RPG staff can see the post, therefore it is commonly seen as deleted since no one but those few can actually see the post.