Note: This operation is only available if you have Invoice Settlement enabled. The Invoice Settlement feature is generally available as of Zuora Billing Release 296 (March 2021). This feature includes Unapplied Payments, Credit and Debit Memo, and Invoice Item Settlement. If you want to enable Invoice Settlement, see Invoice Settlement Enablement and Checklist Guide for more information.

Applies a posted credit memo to one or more invoices and debit memos.

You can apply a credit memo to an invoice or a debit memo only if you have the user permission. See Billing Roles for more information.

When you apply a credit memo, the total number of credit memo items and the items that credit memo items to be applied to must be less than or equal to 15,000.

If the limit is hit, you can follow the following instructions:

• If you want to apply one credit memo to multiple invoices or debit memos, decrease the number of invoices or debit memos in the request.
• If you want to apply one credit memo to a single invoice or debit memo with a large volume of items, you have to specify invoice items or debit memo items in the request. The maximum number of invoice items or debit memo items that you can specify in the request is 1,000.
• If a credit memo has a large volume of items, you have to specify credit memo items in the request. The maximum number of credit memo items that you can specify in the request is 1,000.

If the Proration application rule is used, when applying credit memos, the following quantity must be less than or equal to 15,000:

(number of invoice items + number of debit memo items) * number of credit memo items

Otherwise, the First In First Out rule will be used instead of the Proration rule.