Avoid duplicating a recurring invoice

Scheduled-period protection

Cord checks that the recurrence is still active and retains the date and settings read before claiming the period. This prevents two runs from claiming the same issuance or overlooking a concurrent edit or pause. The next date is calculated from the scheduled period and respects the end date. Invalid dates and an end before the start are rejected.

Creating a recurrence does not add automatic charging. If issuance fails, review Last error and the document before repeating it; automatic recovery of every failed period is not implemented.

If only email delivery failed, resend the existing invoice. See the recurrence guide.

Availability of the September improvements is being verified. See scope and release status; contact support if a described action is not yet shown in your account.