Finnish Customs will implement a new guarantee system starting on May 24, 2025. As a result of this change, the EORI number will no longer be sufficient for reserving a guarantee in customs declarations. In the future, the Guarantee Reference Number (GRN) must be provided in the declarations.
When is a GRN -number required?
The GRN must always be provided in a standard declaration and in a simplified declaration if you submit:
- A customs declaration for centralised import
- A declaration based on which Customs will reserve a guarantee to cover a customs debt or customs liability
- A customs declaration for inward processing, temporary admission or end-use.
If the GRN hasn’t been provided in these cases, Customs rejects the declaration.
Where can I find my company’s GRN -number?
The GRN -number can be found in your company’s valid customs authorization, such as:
- Comprehensive guarantee authorisation (CGU)
- Payment deferment authorisation (DPO)
- Authorisations for special procedures, such as inward processing authorisation (IPO) or end-use authorisation (EUS).
Note! The number of the guarantee authorization alone is not sufficient – the actual GRN -number is required.
Where should I inform my company’s GRN -number?
Send your company’s GRN -number to your CHS contact person as soon as possible so we can prepare for the changes in good time.
Air freight: airimphel(at)chs.fi
Sea freight: oceanimphel(at)chs.fi
Email subject: GRN Number / Company Name
From 24 May 2025, you can also check your GRN in the My Details service.
More information is available on the Finnish Customs website.
Thank you for your cooperation!
Source: Finnish Customs
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