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2024 February – PoUS Q&A

Portbase and the Dutch Customs had organised a meeting concerning changes that are in effect after 01-03-2024. We hereby share all questions and answers we received that day and divided them by three subjects.

Changes in T2L(F) cargo declaration

Q1: When does PoUS (Proof of Union Status) come into effect?
A1: PoUS is the new European information system with which Customs automatically issues and checks Union status certificates T2L(F) and will come into effect from 1 March 2024. The new registration rules apply from that date. T2L(F) Union status certificates have a validity of 90 days.
The MRN (Master Reference Number) that you receive upon registration must be stated in the ATO (Temporary Storage Declaration). From this date you cannot email/send T2L(F) forms in PDF to the Entry and Exit Department of the Rotterdam Maasvlakte customs office (hereinafter abbreviated as BU) of Customs.
BU manually reports the arrival in PoUS of the T2L(F) goods and Customs later checks the legality of the T2L(F) proof. Customs' customer management department does the latter.
From Q3 2025, the customs manifest will also be registered in PoUS. At that time, Permit TC 12 (Permit for drawing up a shipping manifest after departure) will also expire and can no longer be used.

Q2: Does this apply to incoming and outgoing cargo of Union goods to and from the Netherlands?
A2: Yes, for incoming cargo you will receive a T2L(F) MRN from your overseas partner. For outbound cargo, you supply a T2L(F) MRN to your overseas partner.

Q3: Does the Netherlands have any adjustments to the European regulations?
A3: No, all Union countries apply the same rules and policies.

Q4: Do I also have to register the T2L(F) in the ATO as of March 1, 2024 if this certificate was issued on paper before March 1?
A4: The current method of registration in the ATO for Union status certificates issued on paper before 1 March 2024 remains unchanged. You register this as C status and keep a paper copy.

Q5: How should I handle T2L(F) Union Status Certificates issued on or before February 29?
A5: Due to the validity of 90 days, the current regulations surrounding these T2L(F) Union status certificates are sufficient. After May 29, 2024, the old procedure will no longer apply.

Q6: Is there a European emergency procedure known if the PoUS system is not available?
A6: No, there is no emergency procedure known at this time. Dutch Customs is currently collecting all feedback and sharing it with TAXUD (Taxation and Customs Union Directorate-General).

Q7: What must be registered for outgoing Union goods to receive an MRN?
A7: TAXUD does not yet have work instructions available, which will only be available after March 1, 2024. Dutch Customs is now developing work instructions, with the aim of releasing them in week 7, 2024 via

Q8: No information is yet available from other EU countries, the deadline is the same. Why wasn't this announced earlier?
A8: This will differ per EU country. The Netherlands also noticed this late. However, we are now working with Portbase on its implementation. Dutch Customs has drawn up a FAQ list and posted it on and this will be maintained together with input from Portbase.

Q9: What can I do with my current TC12 permit until Q3 2025?
A9: The Permit TC12 (Permit for drawing up a shipping manifest after departure) will expire in Q3 2025. Until then, the permit can be used, as long as the goods are registered as C status. If you intend to apply for this permit, you must decide for yourself whether it is still worthwhile.

Q10: We jointly developed the Maritime Single Window, but Dutch Customs has now opted for a separate system for the registration of Union status certificates. We will soon also be dealing with ICS 2.0, why is this not being brought into line?
A10: The use of PoUS for Union status certificates T2L(F) and soon the customs manifest is a European obligation. This is also the case with the use of ICS 2.0. In the European Union, new policies for electronic procedures have been established in the Multi-Annual Strategic Plan for Electronic Customs (MASP). Customs Netherlands has no influence on the timelines set for this.

Q11: This process has no effect on Union goods that concern NL-NL?
A11: Correct. No proof of Union status is required for this transport.

Q12: No C status is stated for Union goods in the ATO. I am not a shipping company/shipbroker and am therefore not allowed to mention ICT and the MRN of the Union status certificate in the MID. How do I get the Union goods from the RTO?
A12: The procedure for this situation before March 1, 2024 will not change. There is one difference, you do not have a paper proof of Union status. You only have one MRN. You contact the Entry and Exit Department of the Rotterdam Maasvlakte customs office. They report the arrival of the Union status certificate in PoUS based on the MRN. The CWP (Central Work Point Customs) unblocks the Union goods. With a fiat removal you can remove the Union goods from the RTO.

Changes in control of T2L(F) cargo handling

Q13: In the ATO, the B/L must be registered as C status with the T2L(F) MRN, is this to check whether the MRN is valid?
A13: No, Customs manually reports the arrival of the T2L(F) goods in PoUS. This is not to check whether it is legal, but to ensure correct debiting of the ATO.

Q14: MRN validation (checking validity) is currently not possible, registration of the MRN in the ATO is not a valid burden of proof. How can we manage and control this? Isn't it better for me to register as non-Union goods (T1) or Union goods and provide evidence afterwards?
A14: In the T2L(F) MRN, the 17th letter is a 'P'. The letter 'P' indicates that it is a Union status certificate registered in PoUS. This is not sufficient to check the validity of the MRN. You can use the MRN to search the PoUS system. If desired, you can make mutual agreements with the permit holders of Authorized Issuer Permit - ACP, such as providing a printout of the Union status certificate from PoUS for your administrative workload.

The MRN has the following structure:

    • Field 1: last two digits of the year of formal acceptance of the declaration (YY) (n2);
    • Field 2: Identification code of the country where the declaration/proof of the customs status of Union goods/notification is lodged (country code in two letters) (a2);
    • Field 3: Unique message identifier by year and country (an..12);
      • Maximum the first 6 characters representing the customs office reference number;
      • Up to the next 6 characters to complete the unique identification using one specific character that identifies centrally generated MRNs. This specificity may not be used by national PoUS systems when generating MRNs at national level.
    • Field 4: Procedure identification “P” (a1);
    • Field 5: Check digit for the entire MRN to allow detection of an error when recording the entire MRN (an1).

Example is: 23NL000702C00004P0

Q15: With the arrival of an MRN registration for Union status certificates T2L(F), the process becomes compliant with MRN as we know it for other customs declarations and that is a positive development.
A15: Correct.

Q16: Who is responsible if there is an error in the registration process? For example, a typographical error in the MRN number or an unlawfully issued Union status certificate?
A16: The submitter remains responsible for correct administration.

Q17: What if the Union Status Certificate is not reported in PoUS within 90 days before arrival? And is it registered as C status on the ATO?
A17: A shipbroker is responsible for his ATO and Customs will ask for proof.

Q18: How does Customs check the legality of the Union status certificate? Is paper administration still required?
Q18: This takes place digitally from the PoUS system. No paper file is required for evidence registered in PoUS. You are free to make separate agreements with the permit holders Authorized issuer permit - ACP for a paper version (print from PoUS) for your own administration if desired.

Automation options

Q20: How do we register a T2L(F) Union Certificate of Status?
A20: In the EU Customs Trader Portal with eHerkenning level 3, which can be registered in both Dutch and English. No automation is currently possible from your own systems and the EU Customs Trader Portal. You can make prints from this portal to share with third parties.

Q21: This will be manual work. Creating a T2L(F) will be an automated process for many parties before March 1, 2024. The data from a declaration for release for free circulation (import - IM4) is used to automatically draw up a Union certificate of status T2L(F). Can Portbase help us digitize this process?
A21: Yes, but that is not foreseen and impossible in the current timeline. TAXUD has not yet provided clarity on any further development of further optimization/automation. Dutch Customs hopes to provide this feedback as quickly as possible.

Q22: Can I also work with codes in my ATO, such as code 27 for Transhipment? And then automatically process messages?
A22: No, not at the moment. The operation of REN (Re-Export Notification) with the Transhipment service is not covered by this.

If you have any new questions concerning PoUS, please contact our Customer Service.

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2023 November – Introduction DMS 4.1

With the introduction of DMS 4.1, a NID-notification will follow with a unique Movement Reference Number (MRN) . This can only be submitted via the service NID which means two new document types. The new procedure is going to use the following document types:

  • IAI: Registration in Import Administration (replaces DIN)
  • IAE: Registration in the Entrepot Administration (replaces DEN)

In either case, enter the MRN number which you received from Customs. The new document types can now be used with a system link. You can find the new specifications here.

Terminal approval

On the 1th of August 2023 we have automaticaly approved all customers of the service Local Clearance to use IAI and IAE, if they had a approved setting for the former doc types DIN and DEN.

If you weren't a Local Clearance user, you'll need a written approval from each terminal were you would like to submit these new doc types. You can send the approval from these terminals via e-mail towards

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2023 September – Terminal status response

Some terminals won't send a confirmation for your pre-notificaion. Despite the lack of confirmation, you can assume that the pre-notification is sent correctly. This variation between terminals creates confusion and let to Customer Service calls, we hope to improve our service with the following addition:

In NID, these notifications where shown with 3 blue indicators and status 'sent'.

To reflect the correct status, we now show a geen statusbar and status 'sent, terminal wont send respone'.

This updates applies to pre-notifications to Rotterdam World Gateway, Hutchison Ports Delta II, APM terminals Maasvlakte II and Barge Center Waalhaven.

Long term solution:

The variation of these interfaces between the terminals creates a lot of Customer Service calls and we are in contact with all terminals to implement the confirmation (and withdrawal).

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2023 March – New look and feel for NID

As per March 27 (monday), Notification Import Documentation will get a new look and feel.

Many of you will recognize the new look, as it is similar to the Cargo Controller. By updating NID it will be easier to switch between the two services.

The features of NID remain exactly the same.

New overview screen

New details screen

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10 Oct 2022 | Customs – enforcement of sanctions package 6

Customs monitors compliance with sanctions measures in respect of the sanctioned flow of goods including those imposed against Russia. On 3 June 2022, the European Union (EU) adopted the 6th sanctions package against Russia. One of the measures is that there is a ban in the EU on the purchase, import, and transfer of crude oil and refined oil products from Russia.

Read the full letter.

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Sep 13, 2022 | Request Sailing Oude Maas via MyPort

From September 15, you can submit the well-known application for Bevaren Oude Maas via MyPort instead of via email to the HCC. The HCC will then receive the application digitally and will also process it digitally. The assessment will also be returned to you in MyPort.

The new application form can be found in MyPort with the existing applications for Mooring Berth outside the petroleum harbour, Work and Transport. You can reach MyPort via the IAM connected login page and then by choosing the MyPort tile.

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2021 September – Download feature + added search filter by date

  • Download feature: It is now possible to download a CSV-overview of all your previous notifications. You will find the download-button at the top of your overview. search filters will also apply to the downloaded file.
  • Date filter: New filter option to filter by date (from-to)

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