If DLsite is unable to confirm your registered invoice number, whether via the registration notice for the Qualified Invoice Issuing Business Number, e-Tax, or the Qualified Invoice Issuing Business Publication website, we will be unable to confirm the integrity of the number for registration.
We recommend applying for the issuance of an invoice number well in advance. If you apply at the end of the month, there may be delays due to a large number of registration applications in processing at the tax offices, and you may not be able to apply to DLsite in time before the end of the month.