No. An Attorney for Customs Procedures (税関事務管理人) appointment cannot be backdated to cover a shipment that already cleared. The notification that creates the appointment must be on file with Japan Customs before any import declaration (輸入申告) is made, not after. If goods cleared without a recorded appointment, that past clearance cannot be retroactively brought under an appointment filed later; the fix is making sure the next shipment does not repeat the gap.
Why Can't an ACP Appointment Be Backdated?
Because the appointment is a precondition for filing, not a paperwork step that can be reconciled afterward. Customs Act (関税法) Article 95 (関税法第95条) requires a non-resident principal, one with no address, residence, or office in Japan, to have a Japan-resident attorney (税関事務管理人) on record before that principal's goods are declared for import. The statutory sequence runs one direction only: notification first, declaration second.
The mechanism is the 税関事務管理人届出書 (Customs Form C No. 7500), filed in two copies (原本 plus a 交付用 copy Customs returns) with the Customs office where procedures will be performed. Customs records the notification; it does not issue a retroactive certificate reaching back to cover a declaration that already happened. If a shipment cleared while no valid appointment existed, the entity that made that declaration was not a validly appointed attorney for customs procedures at the time of filing. There is no later filing that changes what was true on the date of that declaration. For the full mechanics of getting an appointment on record in the first place, see the step-by-step ACP setup guide.
What Is the Actual Sequencing Requirement for an ACP Appointment?
The requirement is that eligibility, KYC, and the signed appointment all sit ahead of the document pack, and the document pack sits ahead of the notification filing, which itself sits ahead of any import declaration. Skipping ahead in that order is what produces a shipment cleared without cover.
In practice the sequence has four load-bearing points. First, eligibility and identity verification confirm the non-resident status that Article 95 requires before any contract exists. Second, the signed appointment instrument, executed by an authorized representative of the non-resident principal, is distinct from the commercial service agreement; the agreement is not the appointment. Third, many providers, including Aplash, run a pre-consultation (事前相談) with the intended Customs office before submission to confirm the office of filing and the form set; this is operating practice, not a statutory requirement, and should never be represented to a client as a legal precondition. Fourth, the notification itself is filed and recorded, and that recording is what creates the attorney's standing before Customs, not a milestone that happens to sit near the filing. Appointment is standard per Customs office; a business clearing through more than one port needs a separate filing at each office, a detail worth confirming at intake rather than after the first multi-port shipment. A separate post walks through what recording actually takes in calendar time.
Key points:
(a) The 税関事務管理人届出書 (Customs Form C No. 7500) notification must be filed and recorded before the import declaration it is meant to cover, never after.
(b) The appointment is a 届出 (notification) that Customs records, not a 承認 or 許可 (approval or permit); recording confirms an attorney is on file, it does not pre-clear any shipment.
(c) One appointment covers one Customs office; a business using multiple ports needs a separate 税関事務管理人届出書 filing at each office before goods route through it.
What Should a Non-Resident Importer Do If They Shipped Before Appointing an ACP?
Treat the past shipment as a closed, structurally unprotected event and focus every action on the next one. Going back and filing an appointment now does not change the status of the goods that already cleared, because the filing has no retroactive reach under Article 95.
The workable path is to complete the appointment and the full supporting document pack, corporate documents of the non-resident principal, the signed appointment instrument, and a confirmed port or ports, before any further declaration is contemplated. That means finishing eligibility and KYC review, executing the appointment instrument, and getting the notification recorded with the relevant Customs office ahead of the next shipment's filing, not in parallel with it. A business that already has one non-resident entity engaged with an attorney and is now weighing whether to consolidate providers, rather than start from zero, should look at how a mid-relationship provider transition is sequenced so a live appointment window does not open a clearance gap of its own. Ongoing continuity once the appointment is recorded, and what happens if a filed appointment lapses, is covered in a separate continuity guide. For the underlying question of when an appointment structure applies at all instead of setting up a full Japan entity, see the firm's ACP service page.
Frequently Asked Questions
If my ACP appointment is filed this week, does it cover the shipment I already cleared last month?
No. The notification only has effect from the date Customs records it forward; it cannot reach back to cover a declaration filed before the appointment existed. Customs Act Article 95 places the appointment as a precondition for the declaration, not a later formality that can be reconciled against one already filed.
Who actually filed the import declaration if there was no ACP appointment on record at the time?
Whoever filed that declaration was not acting as a validly appointed 税関事務管理人 for the non-resident principal at that moment, since the statutory basis for that role did not yet exist on the file. Aplash has not been asked to make, and does not make here, any determination about penalty exposure for a specific past filing; that assessment depends on the facts of the filing and should go to the relevant Customs office or qualified counsel.
Does the pre-consultation with Customs before filing change the sequencing requirement?
No, the pre-consultation (事前相談) is a practice step some providers, including Aplash, run to confirm the filing office and form set before submission; it is not a step required by statute. The requirement that survives regardless of whether a pre-consultation happens is the same one: the 税関事務管理人届出書 notification must be recorded before the import declaration it is meant to cover.
Conclusion
The sequencing rule behind an ACP appointment is not a formality; it is what makes the appointment mean anything on the date a declaration is filed. A non-resident importer who shipped before appointing an attorney cannot correct that by filing afterward. The only lever available is making sure eligibility, the signed appointment, and the recorded notification are complete before the next declaration goes in.
This article is informational only and does not constitute legal, tax, or regulatory advice. Consult a qualified advisor before acting on the content. Last updated: August 2026.