workflow: I would like to use event registration with option "pay later". After a check I would like to change the participant status and send an invoice. I dont' find a way to do this automatically, but it is also ok do to this manually. The participant registration and also the invoices should be happen over a year, so I need to know if the participants have already received an invoice, to prevent someone getting the invoice twice.
- is there a way to send an invoice after changing the participant status?
- how to filter out participants which have already received an invoice?
thanks for your help David