Update invoice issue date

Updates the issue date of a specific DRAFT invoice within a contract. Use this endpoint to reschedule when an invoice should be issued without affecting future billing cycles or the underlying contract terms. Only works with invoices still in DRAFT status, and the new issue date cannot be later than the contract’s end date.

Usage guidelines:

This only changes the individual invoice’s issue date - it does not modify the recurring invoice schedule of associated charges or commits. To update both the issue date and future billing schedule, use the ‘edit contract’ or ‘edit commit’ endpoints instead.