@Fedsec
Correct me if things have changed since I was on the tarmac. I know that as a LAME I was required to sign a transit check sheet certifying that the fuel was uplifted IAW the aircraft fuelling manual and Qantas procedures. This was for 744, 767 and A330. Some of the actual tasks were performed by others but I took responsibility by signing the check sheet.
This is still the case. The flight crew sign for accepting the fuel on the fuel distribution sheet of which they keep the original, and we sign on our check sheets that we have done the fuelling IAW the Fuelling manual, QF procedures etc.