Format: Variable length, up to 12,2 N
Description: The subscription billing amount. To update the amount for all upcoming billing cycles (the recur_amt), send amt_tran without date_next. To update the amount for only one billing cycle, send all of the following:

• date_next,
• payment_flag set to Next, and
• amt_tran.

Format: Fixed length, 10, YYYY-MM-DD format
Description: The next billing date for this subscription.
Conditional Requirement: payment_flag is required when sending date_next.

Format: Fixed length, 10, YYYY-MM-DD format
Description: The date the subscription will start.

Format: Fixed length, 32 AN
Description: Update the card ID to be used for recurring charges. The card ID can be updated any time on an active subscription. Send an empty string in this field to udpate the record to charge by the customer's primary form of payment.

Format: Variable length, 3 to 4 A
Description: Determines whether date_next changes only the upcoming billing date or all future billing dates. Possible values:

• Next - The date_next value only changes one future billing date (the next billing date).
• All - The date_next value changes the next billing date, and all future billing dates are updated in line with the (new) next billing date.

Conditional Requirement: payment_flag is required when sending date_next.

Format: Variable length, AN
Description: A short description of the subscription.

Format: Fixed length, 20 N
Description: The Payment Gateway profile ID to be used when billing transactions. The new profile should use the same currency as the original.