Check your account. 1 year from the time you received them. Give or take a week because some of the brokers do not receive them on the day it is a done deal.
My scottrade has (TIDAL) with 8000 shares in my account but I believe the are restricted till FEB 2009 sometime. Check the date on this link. GO TO COMPANY INFO TAB.
Div: 10 shares Restricted Tidalwave Holdings Series 2 Preferred stock for each share of Com held Pay Date: Feb 28, 2008 Record Date: Feb 21, 2008