According to the Westdeutsche Allgemeine Zeitung (WAZ), authorities have uncovered evidence that the company, based in North Rhine-Westphalia, has been issuing fake Medical Psychological Assessment certificates to applicants who paid fees.
The exams, mainly given in the western towns of Dortmund and Essen, include psychological and medical assessments and hand-eye coordination tests.
Several drivers were able to use the falsified certificates to get their licenses back, but suspicious authorities began investigating and found at least 40 cases of falsification, the WAZ reported.
Approximately 100,000 motorists are ordered by authorities to take Medical Psychological Assessments before being allowed to drive each year, in most cases because they have been caught driving while under the influence of drugs or alcohol.
But private providers are responsible for running the tests and some have charged that they are open to fraud.
Klaus-Peter Kalendruschat, a manager at TÜV Nord, a company that provides the assessments legally, told the WAZ that consumers should ensure that their assessment centres are fully licensed.
He said he is convinced that because of the high stakes involved, there is a criminal element willing to issue falsified examination certificates.