Did you do it anonymously or did you have your name on it? According to their form
All referrals are sent to analysts at the EO Classifications Office in Dallas. After a
referral is made, the IRS will send an acknowledgement letter to all non-IRS sources
making a referral, unless it was made anonymously.
They should be required to process it, but only if it's not anonymous. I'm guessing anything anonymous is thrown in the bin unless it's super serious.