This field is related to the KSW – Switzerland activity code.
It is used to control the use of the payment methods. The following settings are available:
Non-ISR
For payment types not related to ISR payments like cash payments, for example, or payment processes outside of the Swiss banking
For payment types used to print on sales invoices, for example ISR printing with ISR reference line
DTA
For payment types used to generate Swiss banks bank files (DTA format)
EZAG
For payment types used to generate Postfinance bank files (EZAG/OPAE format)
ISO
For Swiss ISO payment types based on the ISO 20022 format. This selection is also required to print QR-bill customer invoices.