Yes, the customer or ERP vendor can control this in the ISO 20022 pain.001 file.
In today’s ISO offering bankgiro products is per default batch booked and there is no possibilities to choose single booking in the file, but in the future it will work as follow:
The "Batch Booking" field controls whether the payment is made as a bulk booking or if it is booked individually, so called “single booking”. There, the customer needs to enter "true" or "false". True = bulk booking and False = single bookings.
More information about what applies to each payment product can be read in our file format descriptions, the Message Implementation Guidelines (MIG).