In The Great Hunt Verin tells Ingtar that she was sent by Moiraine. At the end of the book Moiraine denies sending Verin. Verin also left the procession to Tar Valon after Moiraine. Any thoughts on this as her PoVs later in the series seem to dismiss her as a possible Black Sister.

There's been lots of discussion on this. Check the FAQ, and also this link:

 

http://www.wotmania.com/faqtopic.asp?ID=8

 

Rather than me paraphrasing it all, that is. :?