A support service is available to answer your questions about using the OZG-RE or if you are having issues.
It can be reached by email or by telephone:

Support and service for invoice recipients (authorised users):

Send an email to sendersupport-xrechnung@bdr.de  Contact form

Call +49 (0)30 2598 4436  +49 (0)30 2598 4430

(Mon – Fri 07:00 AM – 06:00 PM)

Support and service for invoice recipients:

Send an email to sendersupport-xrechnung@bdr.de  Contact form

Call +49 (0)30 2598 4436  +49 (0)228 99681 10101

(Mon – Fri 08:00 AM – 04:00 PM)