The ZOSOCON is a ZUGFeRD Open Source Online Conference held in english. It's a free open-source workshop for the ZUGFeRD e-invoicing standard.
- The first was on Friday, 26 May, 15:00-16:00 CET 54min 136MB recording.
- the second was second on Monday, 24 July, 15:00-16:00 CET and focused on ZUV (ZUGFerd Valdidator)
- the third was on May 1st, 2018 and again focussed on validation of ZUGFeRD files.
- the fourth took place on 29 April 2021, 10-12:00 CET and was a barcamp on e-invoicing in general