wabisabi2019

[stray night]

Voiding only applies for finalized (open) invoices.

For draft invoices, you can delete those:
https://stripe.com/docs/api/invoices/delete

[rugged ravine]

is that true for subscription invoices though?

I saw this in docs:

Permanently deletes a one-off invoice draft. This cannot be undone. Attempts to delete invoices that are no longer in a draft state will fail; once an invoice has been finalized or if an invoice is for a subscription, it must be voided.

^ for "deleting an invoice" docs

[stray night]

Sure, you cannot delete subscription drafts, you'd finalize & void those

You can't delete them

Pardon me, i missed word "subscription" in your initial message