> This page is for Docs. > For clean Markdown of any page, append .md to the page URL. > For a complete documentation index, see https://zuora.ferndocs.com/llms.txt. > For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://zuora.ferndocs.com/_mcp/server. # Unapply payment update fields > Use this reference to view all the fields associated with the unapply payment data dictionary. Use this reference to view all the fields associated with the unapply payment data dictionary. | Object | Field Name | Value | Required to Update | Description | | ----------------------------- | ----------------------------------- | ---------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------- | | Payment | IsNewPayment | TRUE or FALSE | This field is required when unapplying a payment to a Debit Memo or Invoice. Enter "True" if applicable; otherwise, set the value to "False" or leave the cell blank. | Indicator Column marking the start of a new object | | Payment | Effective Date | STRING \ | Optional | The date when the payment is unapplied, in yyyy-mm-dd format. The effective date must be later than or equal to the maximum effective date of the payment. | | Payment | paymentKey\* | STRING | Required for updating payment record | The unique ID or number of an unapplied payment. For example, 8a8082e65b27f6c3015b89e4344c16b1, or P-00000001. | | Array of objects (debitMemos) | IsNewDebitMemo | TRUE or FALSE | This field is required when unapplying a payment to a Debit Memo. Enter "True" if applicable; otherwise, set the value to "False" or leave the cell blank. | Indicator Column marking the start of a new object | | Debit Memo | Debit Memo Amount\* | number \ | Required when unapplying payment to Debit Memo | The amount of the payment that is unapplied from the debit memo. | | Debit Memo | Debit Memo Id | STRING | | The unique ID of the debit memo that the payment is unapplied from. | | Debit Memo | Debit Memo Number | STRING | | The number of the debit memo that the payment is unapplied from. | | Array of objects (items) | IsNewDebitMemoItem | TRUE or FALSE | This field is required when unapplying a payment to a Debit Memo Items. Enter "True" if applicable; otherwise, set the value to "False" or leave the cell blank. | Indicator Column marking the start of a new object | | Debit Memo Items | Debit Memo Items Amount\* | number \ | Required when unapplying payment to Debit Memo Item | The amount of the payment that is unapplied from the specific debit mem or taxation item. | | Debit Memo Items | Debit Memo Items Debit Memo Item Id | STRING | | The ID of the specific debit memo item. | | Debit Memo Items | Debit Memo Items Tax Item Id | STRING | | The ID of the specific taxation item. | | Array of objects (invoices) | IsNewInvoice | TRUE or FALSE | This field is required when unapplying a payment to an Invoice. Enter "True" if applicable; otherwise, set the value to "False" or leave the cell blank. | Indicator Column marking the start of a new object | | Invoice | Invoice Amount\* | number \ | Required when unapplying payment to Invoice | The amount of the payment that is unapplied from the invoice. | | Invoice | Invoice Id | STRING | When both the invoiceNumber and invoiceId fields are specified, the two fields must match with each other. | The unique ID of the invoice that the payment is unapplied from. | | Invoice | Invoice Number | STRING | When both the invoiceNumber and invoiceId fields are specified, the two fields must match with each other. | The number of the invoice that the payment is unapplied from. For example, INV00000001. | | Array of objects (items) | IsNewInvoiceItem | TRUE or FALSE | This field is required when unapplying a payment to Invoice Items. Enter "True" if applicable; otherwise, set the value to "False" or leave the cell blank. | Indicator Column marking the start of a new object | | Invoice Items | Invoice Items Amount\* | number \ | Required when unapplying payment to Invoice Items | The amount of the payment that is unapplied from the specific invoice or taxation item. | | Invoice Items | Invoice Items Invoice Item Id | STRING | | The ID of the specific invoice item. | | Invoice Items | Invoice Items Tax Item Id | STRING | | The ID of the specific taxation item. |