|Index||-||FAQ - Cart Help Buttons - Extra Features - Recurring Billing|
Normally this value is not stored with recurring transactions. Check this box to store the CustomerID for future recurring transactions.
Once a transaction has been entered into the recurring database you can edit or delete the CustomerID by clicking edit for that recurring transaction.
If a CustomerID is present it will be sent to the merchant when using Field 11: itemsilentpost (optional) or used in certain export formats like the CSV Format Details