Automatic Payments Can Be Created On The Scheduled Payment Dates
The system will create automatic payments on a pay plan's scheduled payment dates if:
The account is set up for automatic payment (as described under How To Set Up A Customer To Pay Automatically), and
The payment method defined on the pay plan indicates automatic payment is being used
The background process called PPAPAY is responsible for creating these automatic payments. It does this by calling the automatic payment creation algorithm plugged in on the installation record.
Note: 
If the Autopay Creation Option on the installation record is set to Create On Extract Date, the automatic payment is NOT distributed and frozen when the automatic payment is initially created. Rather, a separate background process ( APAYDSFR) distributes and freezes the automatic payment on the automatic payment GL distribution date (refer to Automatic Payment Dates for more information on how this date is calculated). Refer to Automatic Payments for more information.