"We are very optimistic that the investigation can be resolved in the next couple of months," Braun told analysts on a conference call.

Braun said he expected the police probe, launched following allegations by the Financial Times, to confirm the outcome of an investigation by Wirecard's own law firm that found no material wrongdoing by the company.

Commenting on separate allegations that Wirecard had overstated advances made to merchants, Braun said these were unfounded. "The merchant relationships are authentic," he said.

(Reporting by Douglas Busvine, editing by Riham Alkousaa)