Log4Om is committed to resolving call signs with 100% accuracy. Thanks to Chuck K7PT work on callsign database have, starting from today, implemented a new feature in this quest. Log4OM now resolves contest calls that can not be resolved normally using a new file Special Contest Calls. Example is the TO series which can be many DXCC entities.
There is nothing the user has to do as it is handled automatically by Log4OM starting from version 1.31.0 at first SCL update