Customs clearance confirms completion of the customs step at the time the declaration was processed; it does not make the declared data immune from later review. After goods reach the warehouse, Customs may reconcile the declaration with contracts, transport, payment, accounting, inventory, technical records, origin evidence and sectoral controls. Keeping only the clearance dossier without a transaction-to-accounting audit trail often creates explanation risk. This article explains the nature, location, statutory periods, records and a controlled response process.

B2B operational reference | Updated 20 July 2026 | Not legal advice for a specific case

QUICK FACTS

Nature

A review after clearance to assess dossier accuracy, truthfulness and legal compliance.

Locations

At a customs office or the declarant premises, including head office, branch, shop, production and storage locations.

Audit window

Five years from customs-declaration registration.

Control point

The declaration must reconcile with commercial, accounting, payment, warehouse, technical and physical evidence.

SCOPE

Applies to importers, exporters, EPEs, processing/export-manufacturing businesses, cargo owners, customs declarants and accounting, warehouse, procurement, technical, legal or compliance functions holding relevant data.

The actual scope depends on the decision, period, declarations, goods, regime and risk issue. Not every audit requires every document listed.

KEY TERMS

Term	Meaning	Operational role
Post-clearance audit	Customs review of dossiers, accounting books/vouchers and related data after clearance; physical goods may be checked where necessary and still possible.	Assesses declaration accuracy and compliance.
Audit scope	Declarations, period, goods, regime or issues stated in the decision/request.	Limits the records and explanations required.
Audit trail	Evidence of how data was created, approved, changed and used.	Links the declaration to transaction, accounting, warehouse and decisions.
Tax assessment	Competent authority determines tax liability where declaration is insufficient or incorrect.	May follow a tax-shortfall finding.
Tax recovery	Additional tax payable under a processing decision.	Separate from late-payment interest and penalties.
Reservation of opinion	A recorded disagreement in minutes or conclusion.	Preserves the position for explanation, complaint or litigation.

NATURE AND MECHANISM

The audit is not a formal re-reading of the declaration. Customs may reconcile declared data with commercial and transport records, accounting and payments, technical evidence, inventory, production, actual use, origin and sectoral controls.

Customs: declarations and filed, presented or retained documents.
Commercial: contracts, POs, invoices, packing lists, insurance, freight and adjustments.
Accounting/payment: AP, bank, sub-ledgers, GL and allocations.
Technical/goods: catalogue, BOM, model, serial, composition, function and actual condition.
Compliance: origin, permits, specialised inspection, tax relief and use conditions.

Selection may arise from indications of infringement, risk management or compliance assessment. Selection is not itself a finding.

Operational principle: a dossier sufficient for clearance may not be sufficient for post-clearance substantiation.

COMPARISON OF REVIEW TYPES

Type	Timing	Focus	Location/output
During-clearance inspection	Before clearance/release.	Dossier, policy, tax and possibly physical goods.	Supports clearance decision.
PCA at Customs	After clearance within statutory period.	Specific dossier, records and explanation.	At Customs; result notice issued.
PCA at business	After clearance where deeper reconciliation is needed.	Declaration, finance, accounting, warehouse, production, goods and systems.	On-site team; minutes and conclusion.
Sectoral/market inspection	Under sectoral law.	Quality, safety, labels, registration and traceability.	Not the same as customs PCA.
Internal self-review	Initiated by business.	Detect differences and exposure.	Issue log, supplementary filing and CAPA.

COMMON AUDIT SUBJECTS

Subject	Primary question	Evidence linkage
HS and commodity policy	Does classification match construction, function and technical evidence?	Declaration – catalogue – datasheet – images – BOM.
Customs value	Are all payments and adjustments included?	Contract – invoice – payment – freight – insurance – royalty – notes – ledger.
Origin/C/O	Do goods meet origin rules and documents match shipment?	Origin evidence – invoice – transport – HS – criterion – production records.
Quantity/weight/specification	Does declaration match receipt, inventory, sales/production and transport?	PL – B/L/AWB – receipt – inventory – sales invoice.
Regime/use	Were goods used under declared regime and conditions?	Declaration – contracts – norms – finalisation – stock issue – assets.
Tax relief/refund	Were qualifying conditions maintained?	Lists – project – use evidence – disposal/conversion.
Permits/sectoral control	Do records cover the holder, goods, period and quantity?	Permit – result – label – model – quantity – declaration.
Data consistency	Do departments retain the same controlled version?	ERP – customs software – WMS – approval and version logs.

RECORDS AND DATA TO PREPARE

Record group	Typical records	Usual owner	Control point
Declaration dossier	Declaration, appendices, amendments, tax documents and notices.	Trade, broker, tax accounting.	Number, version, registration date and status.
Commercial/transport	Contract/PO, invoice, PL, B/L/AWB, freight, insurance and notes.	Procurement, logistics, accounting.	Description, Incoterms, quantity, price, route and extra payments.
Payment/accounting	Transfers, SWIFT, AP, GL, sub-ledgers, COGS and allocations.	Finance/accounting.	Link amount and counterparty to transaction.
Technical/classification	Catalogue, datasheet, manual, nameplate, BOM and composition.	Technical/product/compliance.	Correct model/version existing at filing time.
Origin/preference	C/O, self-certification, e-lookup, PSR and substantiation.	Trade, supplier, compliance.	FTA, form, validity, criterion and transport.
Warehouse/production/use	Receipts/issues, inventory, norms, orders, serials and disposal.	Warehouse, production, assets.	Quantity, use, yield and regime.
Sectoral/circulation	Permits, declarations, conformity, quarantine, quality and labels.	Legal, QA, trade.	Holder, product, model, quantity and validity.
Systems/approvals	ERP, WMS, customs software, HS/value approvals and change logs.	IT, trade, accounting.	Traceability; do not recreate source data after decision.

CONTROLLED RESPONSE PROCESS

Step	Action	Controlled output
1. Receive	Verify issuer, signatory, audited party, period, scope, timing and requested records.	Receipt memo and contacts.
2. Preserve	Prevent overwriting; snapshot systems; retain logs and access.	Data hold and original set.
3. Form team	Assign legal/compliance, trade, accounting, warehouse, technical, IT and spokesperson.	RACI and approval flow.
4. Map declaration to transaction	Link declaration to contract, payment, receipt, use and sectoral evidence.	Declaration index and gap list.
5. Self-reconcile	Review HS, value, origin, regime, tax and quantity; quantify differences.	Issue log and explanation plan.
6. Prepare submission	Arrange by request, number records, cite sources and avoid unrelated disclosure.	Approved submission pack.
7. Work/minutes	Track documents supplied and agreed/disputed issues before signing.	Minutes and reservation list.
8. Review result	Compare findings with records, calculations and prior positions.	Legal-financial memo.
9. Correct/prevent	Meet liabilities where applicable and fix data, SOP, access and training.	Closure file and CAPA.

STATUTORY PERIODS TO DISTINGUISH

Item	Rule	Operational meaning
PCA window	Five years from declaration registration.	Does not replace separate retention rules.
Customs-dossier retention	Declarant retains cleared-goods customs dossier for five years unless another law provides otherwise.	Accounting records follow accounting law.
At Customs	Maximum five working days.	Specific duration appears in decision.
Sending decision at Customs	Within three working days from signing and no later than five working days before audit.	Track valid receipt date.
Result notice at Customs	Within five working days after audit completion.	Separate completion from notice date.
At business	Maximum ten working days; one extension up to ten for large/complex scope.	Track extension decision.
Sending on-site decision	Three days from signing and at least five working days before audit; exception for indications of violation.	Check legal basis in decision.
Minutes/conclusion on-site	Minutes within five working days; conclusion within 15 days after completion, subject to expert-opinion mechanism.	Do not equate minutes with conclusion.

Summarised from Articles 18 and 77–80 of the consolidated Customs Law. Tax, complaint, litigation, accounting and penalty periods are separate.

RIGHTS AND OBLIGATIONS

Category	Core rule	Safe execution
Receive/explain conclusion	Receive conclusion, request explanation and reserve opinion.	Identify disputed page, amount and legal basis.
Verify authority	At on-site audit, request decision and customs identification.	Document reception of audit team.
Decline out-of-scope data	May decline irrelevant information or state-secret material, unless otherwise required.	Give written reason; do not refuse casually.
Provide records	Timely, complete, accurate and truthful.	Handover list, versions and mirror copy.
Cooperate	Appoint authorised person and comply with lawful requests.	One coordinator; internal review of figures.
Complaint/litigation	Exercise under applicable conditions and deadlines.	Preserve reservations, receipts and timeline.

RISKS AND COMMON FAILURES

Failure	Cause	Possible impact	Control
Declaration without decision evidence	HS/value selected from habit or scattered email.	Cannot substantiate filing.	Decision file by declaration/SKU.
Accounting mismatch	Fees, discounts, credit notes or third-party payments not linked.	Value/tax adjustment and late-payment exposure.	Customs–AP–GL–bank reconciliation.
C/O without substance	No PSR, BOM, transport or supplier evidence.	Preference rejection.	Review draft and retain origin file.
Regime/use mismatch	Exempt/processing/EPE goods used or transferred inconsistently.	Tax and enforcement exposure.	Inventory, use and conversion controls.
Multiple versions	Departments hold different files.	Contradictory explanation or wrong submission.	Version control and authoritative repository.
Recreated records	Original source missing.	Reduced credibility and log conflicts.	Preserve source; cite every summary.
Over-disclosure	No coordinator or scope misunderstanding.	Expanded issues and sensitive-data exposure.	Request-to-evidence mapping and approval.

LEGAL BASIS AND OFFICIAL SOURCES

Instrument	Issuer/effect	Role
Consolidated Customs Law 54/VBHN-VPQH dated 23 March 2026	Office of the National Assembly; current consolidated reference.	Articles 77–82 govern definition, cases, locations, periods, process, rights and obligations.
Consolidated Decree 46/VBHN-BTC dated 24 November 2025	Ministry of Finance.	Current consolidated detailed implementation after amendments to Decree 08/2015.
Decree 167/2025/ND-CP	Government; effective 15 August 2025.	Amends Decree 08/2015; read through the consolidated text.
Circular 39/2018/TT-BTC and Circular 121/2025/TT-BTC	Ministry of Finance; Circular 121 effective 1 February 2026.	Current customs-procedure, dossier, data and import-export tax framework.
Law on Tax Administration 38/2019/QH14	National Assembly; effective 1 July 2020.	Tax liabilities, late-payment interest, tax shortfalls and taxpayer rights.

Some statutory titles reflect the organisational structure at enactment. Verify the current authority stated in the audit decision.

FAQ

Can older cleared goods still be audited?

Yes, where the declaration remains within five years from registration.

Does audit selection mean a violation?

No. It may result from indications, risk management or compliance assessment.

Can Customs request accounting books?

Yes, where related to the audit scope.

Must the whole ERP be provided?

Not automatically; determine lawful scope, period, fields and access controls.

What if an error is found?

Assess supplementary filing, tax and transparent explanation; do not alter original evidence.

Can an opinion be reserved?

Yes. State the exact facts, amounts and legal grounds.

Can the conclusion be challenged?

Complaint or litigation may be available; it does not automatically suspend every obligation.

APPLICATION NOTE: Results depend on decision scope, actual records, registration date, rules effective when the transaction occurred and evidence supplied. This article does not determine HS, value, origin, tax or penalty for a specific case. English legal terms are operational references, not official translations.

TGIMEX IMPLEMENTATION SUPPORT

TGIMEX helps businesses turn the article into a shipment-ready checklist, covering input-data review, dossier preparation, milestone control, and coordination with the relevant parties.

Convert guidance into checks

Assign an owner and deadline to every operational control point.

Reconcile shipment data

Compare booking, transport, commercial, customs, and delivery evidence.

Manage operational risk

Record discrepancies, actions, and decision evidence to prevent recurrence.

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