Customs Section 27 Refund: Limitation, Unjust Enrichment and Evidence Guide
Created by: Finin2min Editorial Desk Reviewed by: Ravi Sisodia Source checked: 3 October 2026
A customs refund claim is both a limitation exercise and an evidence exercise. Section 27 claims must be matched to the correct payment, legal basis, relevant date, documentary trail and unjust-enrichment position. A finance team should never treat the challan or Bill of Entry alone as sufficient proof that the claimant is entitled to receive cash.
Define the legal reason for refund
Record whether the claim arises from excess assessment/payment, appellate relief, exemption eligibility, reassessment or another legally recognised basis. The portal category must follow the legal claim, not create it.
Calculate limitation from the correct trigger
The team should document the statutory relevant date and any special rule that applies. Do not use a generic one-year tracker without identifying the event from which the period legally runs.
Prepare an unjust-enrichment memo
Where applicable, show whether the duty incidence was passed to another person. Accounting treatment, costing, customer invoices, credit notes and CA certification may be relevant evidence; the exact burden depends on the claim.
Reconcile refund with litigation and assessment status
A refund based on an appellate or reassessment outcome should connect the order, Bill of Entry, duty payment and final computation. Avoid claiming amounts that remain disputed under a different proceeding.
Refund entitlement matrix
Use a claim matrix with columns for Bill of Entry/challan, duty component, legal ground, order or reassessment reference, relevant date, limitation end date, amount claimed, unjust-enrichment evidence and accounting treatment. This makes it difficult for a legally strong claim to fail because one entry lacks a timing or burden-of-duty analysis.
Accounting proof of incidence
The general ledger alone rarely tells the whole story. Review whether the duty was capitalised into inventory, expensed, included in product pricing, recovered from customers, reversed by credit note or borne by the importer. The evidence should be consistent across costing, invoices, customer adjustments and tax/audit records.
Worked example
An importer succeeds in an appeal holding that a lower duty treatment applied to certain entries. The refund file should map each Bill of Entry to the appellate order, recompute duty, identify the relevant date, show whether the excess burden was passed on, reconcile any customer credit notes and match the sanctioned amount to the general ledger. Merely attaching the appeal order does not complete the evidentiary chain.
Implementation checklist
Step 1: Identify payment document, Bill of Entry and legal ground. Step 2: Calculate the statutory limitation/relevant date with written reasoning. Step 3: Prepare duty computation and refund amount bridge. Step 4: Build unjust-enrichment evidence and accounting reconciliation. Step 5: Attach orders, assessment records, invoices, credit notes and certifications relevant to the claim. Step 6: Track deficiency queries, sanction, credit and any appeal separately.
Common failure points
1. Starting limitation from an assumed date rather than the statutory relevant date. 2. No clear refund computation by Bill of Entry. 3. Ignoring unjust enrichment because the importer believes the assessment was obviously wrong. 4. Mismatch between claim amount and appellate/reassessment outcome. 5. Failure to reconcile sanction with books and receivables.
Refund review questionnaire
Ask five questions before filing: what created the excess payment, which statutory route gives the refund, what is the relevant date, who economically bore the duty, and what document proves each amount. Add a claim-by-claim limitation calendar. If customer pricing included the duty, document any credit note or commercial adjustment used to establish who finally bore the incidence. If the answer is uncertain, do not hide the issue in a generic certificate; escalate it for legal and accounting review.
Reviewer questions before sign-off
Check the legal ground, relevant date, claim computation and unjust-enrichment evidence as four separate questions. Reconcile every amount to the Bill of Entry or payment document and the order or reassessment that creates the refund. Review accounting treatment and customer pricing for evidence of who bore the duty. If any claim crosses a limitation boundary, record the legal basis rather than relying on a portal acceptance message.
Operating review cadence
Maintain a refund-status ledger separate from the general receivables list. Show claim date, amount, deficiency query, response date, sanction, rejection, appeal and cash credit. This prevents long-running customs claims from disappearing into an undifferentiated tax-receivable balance and gives management visibility over claims at risk because evidence or procedural action is still pending.
Final practical note
Do not net a customs refund against unrelated customs liabilities in management reporting unless the legal and accounting basis is clear. Track gross claim, gross liability and actual sanctioned cash separately.
Questions users ask
Does winning an appeal automatically put money into the importer bank account?
No. The refund process, limitation and unjust-enrichment requirements still need to be satisfied as applicable.
What is unjust enrichment in practical terms?
It asks whether the claimant actually bore the duty burden or passed it to another person. The answer must be supported by transaction and accounting evidence.
Should every customs refund use the same relevant date?
No. The correct relevant date depends on the statutory basis and facts of the claim.