If the license for the "Geo-IP & Botnet Filter" expires, the appliance would keep generating the below logs in the INFO level saying that "Botnet Filter Service is not licensed".
sslvpn-syd SSLVPN: id=sslvpn sn= time="2014-02-02 01:39:21" vp_time="" fw= pri=6 m=0 c=703
src= dst= user="System" usr="System" msg="Botnet Filter Service is not licensed" agent="(null)"
sslvpn-syd SSLVPN: id=sslvpn sn= time="2014-02-02 02:39:35" vp_time="" fw= pri=6 m=0 c=703
src= dst= user="System" usr="System" msg="Botnet Filter Service is not licensed" agent="(null)"