The monthly closing statement can always be certified. The auditing standard is IDW PS 951 – The auditing of the internal controlling system at a service company for functions outsourced to the service company. In this case, the customer commissions its auditor (the costs for this are borne by the customer) and arranges an appointment with nexnet for the purpose of certification. The price for this at nexnet is available on request.
Please contact us for this at firstname.lastname@example.org.