Errors in customs declarations are commonplace: a wrong tariff number in the master data, royalties left out of the customs value, a preference claimed without valid proof of origin. Customs law and tax law offer different routes to correct them, some with tight time limits. The articles cited refer to the Union Customs Code (UCC) currently in force. With the EU customs reform, the numbering changes from 21 September 2027; the substance of the provisions described here does not change. A comparison table is at the end of this article.
Amendment of the customs declaration
Under Art. 173 UCC, the declarant may amend a customs declaration upon application. Before the goods are released, this is generally possible as long as customs have neither announced an examination nor found errors. After release, the declarant may apply for amendment within three years of acceptance of the declaration, so that customs base their assessment on the correct particulars.
Invalidation
Where the declaration was wrong as a whole, for example because goods were declared twice by mistake or placed under the wrong customs procedure, invalidation under Art. 174 UCC may be considered. After release, it is only possible in the cases set out in the Delegated Regulation (Art. 148 UCC-DA). For the main groups of cases – wrong customs procedure, declaration made in place of other goods, and distance sales with a right of return – the time limit is 90 days from acceptance of the declaration. Other groups of cases have different time limits or none at all.
Too much paid: repayment and remission
If the company has paid too much duty, it may apply for repayment under Art. 116 et seq. UCC. The main grounds:
- Amounts overcharged (Art. 117 UCC): for example where an incorrect tariff number was used that led to an excessive duty rate, proof of preference was submitted subsequently or the customs value was too high. Time limit: three years from notification of the customs debt.
- Defective goods or goods not complying with the contract (Art. 118): time limit: one year.
- Error of the customs authorities (Art. 119) and equity (Art. 120): time limit: three years in each case.
With preferences in particular, a look back is worthwhile: where proofs of origin were obtained only afterwards, the duty can often still be repaid. More on this in the article on origin and preferences.
Too little paid: post-clearance recovery and limitation
Where the error works against the public purse, customs recover the difference. As a rule, the customs debt may only be notified within three years of the date on which it was incurred (Art. 103(1) UCC).
Two points extend this period in practice. First, it is suspended while an appeal is pending and for the duration of the period for the right to be heard under Art. 22(6) UCC (Art. 103(3) UCC). Second, under Art. 103(2) UCC the period is extended to five to ten years where the customs debt results from an act that was liable to criminal proceedings. In Germany, this is implemented by Section 169(2) sentence 2 of the Fiscal Code (Abgabenordnung, AO), with ten years for evasion and five years for reckless understatement.
The five years for recklessness are, however, not undisputed, because reckless understatement of tax is an administrative offence and not an act liable to criminal proceedings within the meaning of Art. 103(2) UCC. Administrative practice nonetheless applies the period. In borderline cases it is worth raising this point.
The duty to notify under Section 153 AO
Import duties are taxes within the meaning of the AO. If a declarant realises afterwards that its particulars were incorrect and that too little duty was assessed as a result, it must notify and correct this without delay under Section 153 AO. Whether Section 153 AO applies without restriction alongside the provisions of the UCC is not assessed uniformly; in practice, customs require the notification.
Anyone who stays silent despite knowing of the error may, from that point on, commit tax evasion by omission themselves. Unlike a voluntary self-disclosure, the notification does not grant exemption from penalty. It is, however, the right instrument where the original error occurred without intent and without recklessness.
Voluntary self-disclosure with exemption from penalty
Where the error was intentional or at least committed with conditional intent, only a voluntary self-disclosure (Selbstanzeige) under Section 371 AO will help. It must be complete: it covers all offences not yet time-barred relating to the same type of tax, at least for the last ten calendar years. For import transactions, note that customs duty and import VAT are different types of tax. The scope of the voluntary self-disclosure must reflect this. The evaded duties, including interest, must be paid within the time limit set.
A voluntary self-disclosure is barred, among other cases,
- Audit order: where an audit order has been notified,
- Investigation: where the initiation of criminal or administrative fine proceedings has been notified,
- Officials on site: where auditors or investigators have appeared, including for an inspection (Nachschau),
- Discovery: where the offence had already been discovered and the offender had to expect this,
- Amount: where the amount evaded exceeds EUR 25,000 per offence. What then remains is only dispensing with prosecution against payment of a surcharge under Section 398a AO.
In the case of reckless understatement (Section 378 AO), a correction is sufficient as long as no administrative fine or criminal proceedings have been notified. Distinguishing between a simple error, recklessness and intent is the most delicate point of any correction.
Relationship to the customs audit
Many errors are only discovered in a post-clearance audit. By then it is too late for a voluntary self-disclosure with exemption from penalty, but only for the scope of the audit as ordered. For periods and types of duty outside the order, it remains possible. How the audit proceeds is described in the article on the customs audit.
Import VAT and anti-dumping duties
Every correction of the customs value also affects import VAT. For companies entitled to deduct input tax, it is usually a pass-through item, but under criminal law an understatement remains an understatement. Errors involving anti-dumping and countervailing duties become particularly expensive. Much depends here on origin and manufacturer, and a single incorrect particular can trigger duties amounting to a multiple of the value of the goods.
The provisions after the customs reform
The new Customs Code, Regulation (EU) 2026/2108, applies from 21 September 2027. Its annex contains a correlation table. For the provisions discussed here:
| Previously | From 21.09.2027 |
|---|---|
| Art. 103 Limitation | Art. 206 |
| Art. 116 Repayment and remission | Art. 217 |
| Art. 117 Amounts overcharged | Art. 218 |
| Art. 118 Defective goods | Art. 219 |
| Art. 119 Error of the authorities | Art. 220 |
| Art. 120 Equity | Art. 221 |
| Art. 121 Procedure and time limits | Art. 222 |
| Art. 173 Amendment | Art. 88 |
| Art. 174 Invalidation | Art. 89 |
The time limits remain unchanged, as does the structure of amendment, invalidation and repayment.
How to proceed
- Narrow down the error: Which declarations, which period, which types of duty are affected?
- Establish the direction: Too much paid – then examine repayment and secure the time limits. Too little paid – then prepare a notification or a voluntary self-disclosure.
- Assess fault: Before anything goes to customs, it must be clear whether a simple correction is sufficient or a voluntary self-disclosure is required.
- Act promptly: Grounds that bar a self-disclosure can arise at any time, for example with an audit order.
- Document: Record when the error was identified and how it was remedied.
Where criminal law issues are involved, advice on the individual case is advisable.