Advocate Patric Mtshaulana, chairman of the bar, said the complaint was based on findings by former National Assembly speaker Frene Ginwala.
To ensure the matter gets heard, the chairman of Pretoria's ethics committee, Pat Ellis, will lodge a formal complaint against Simelane with the Pretoria Bar tomorrow on the same charge.
Simelane was appointed National Director of Public Prosecutions last week, succeeding Vusi Pikoli who was fired.
Simelane gave testimony at Pikoli's hearing into his fitness to hold office and Ginwala, who chaired the inquiry, questioned his conduct.
Eric