BERLIN (AFP) - German football federation (DFB) general secretary Helmut Sandrock, who helped organise the scandal-hit 2006 World Cup, has resigned, the DFB announced on Friday.

The move comes on the day a law firm charged with investigating Germany's bid for the 2006 World Cup was due to deliver its report, and hours ahead of Fifa's vote for a new president.

Sandrock's departure follows three months on from the resignation of Wolfgang Niersbach over an unexplained €6.7 million (S$10.3 million) transfer to football's world governing body Fifa in 2000, just days before Germany won the right to host the 2006 finals.

"Helmut Sandrock's decision can't have been easy," said acting DFB president Rainer Koch.

Sandrock had been in his job since 2012 and had been due at Fifa's presidential election in Zurich, but was instead absent due to sickness.