In May 2019, a comprehensive investigation was launched and the relevant authorities were notified. Since then, we have been working to understand the causes of the errors and to ensure that we rectify these. We have now reviewed largely all of the 197,000 customer cases in our debt collection systems where there is a risk of overcollection as a result of the original data errors.
We will naturally repay the amount overcollected to the affected customers, but we will also compensate customers for the period during which they should have had the money at their disposal. Moreover, the outstanding debt will be reduced in the vast majority of cases.
During our investigation of the original data errors, we have unfortunately become aware of a number of potential additional issues that we are still investigating. Customers who may be affected by these will be informed on an ongoing basis. We expect that this work may extend into 2022. Only when we have completed our investigations and have corrected the data errors and made corrections to our debt collection systems will we be able to give our customers a final answer about their outstanding debt.
While we continue to investigate the case, the repayment of debt has been suspended for cases in which more than 60% of the debt in default has been repaid and the risk of overcollection is thus the highest. Moreover, no interest will accrue until each case has been resolved.