It is understood the deal could be done by the weekend.

Farah has endured a tumultuous year at Wests with the NSW rake dropped to reserve grade by coach Jason Taylor last month.

He has not returned to the top flight.

It is believed Farah was considering a shift to Cronulla but will commit to South Sydney.

The 32-year-old has a year remaining on his Tigers deal but was told to look for a new club 12 months ago.

Farah played 247 games for the Tigers in a decorated career which included the 2005 NRL Premiership.