No, this does not leave a mark on your credit file and will not affect your credit score.
It is likely that it will. We let the original creditor know when you set up a repayment plan or when you have cleared your outstanding balance. If the original creditor reported adverse information on your credit file, they will update this and that should positively impact your credit score.
Unfortunately we are not able to update your credit file - that is up to your original creditor. The type of creditor and type of debt will determine which credit reference agencies they use and what information they report.
If they do report to credit reference agencies, it's likely that your score will already have been negatively impacted due to missed payments before your debt was passed to Ophelos. If you set up a payment plan or clear this debt with us, we tell the original creditor and they are responsible for updating your score. This will likely have a positive impact on your overall credit score.