It is the first known confession of wrongdoing in the collapse of one of Germany’s biggest companies.
The unidentified jailed executive was the chief executive officer of Dubai-based Cardsystems Middle East.
“My client has voluntarily given himself up for the proceedings and – in contrast to others – takes individual responsibility,” his defence lawyer Nicolas Fruehsorger said.
The Munich prosecutors declined to comment. They have not identified the individual by name to avoid prejudicing legal proceedings.
Wirecard filed for insolvency last month owing creditors 4 billion euros ($4.55 billion) after disclosing a 1.9 billion euro hole in its accounts that its auditor EY said was the result of a sophisticated global fraud.
The executive had travelled from Dubai and turned himself in last week.
The arrest was made on suspicion of conspiracy to commit fraud, attempted fraud and aiding and abetting other crimes, prosecutors said.
(Reporting Joern Poeltz; Writing by Tom Sims; Editing by Leslie Adler and Jonathan Oatis)