Sometimes it was a foot tap, other times a little kick under the table, but always there was a signal. A few seconds later, the CFMEU official would drop a hand down to accept $5000 in rolled-up $100 notes.
The now ousted CFMEU NSW leader Darren Greenfield and his son, branch deputy Michael, repeated this ritual six times over three years, collecting literal under-the-table payments and even the occasional envelope stuffed with cash at union offices or their home.