The Delhi High Court on Friday, December 19, 2025, asked the Customs department to respond to a plea by InterGlobe Aviation, which runs the IndiGo airline. IndiGo seeks a refund of more than ₹900 crore paid as Customs duty on aircraft engines and parts that were re-imported into India after repairs overseas. A Bench of Justices V Kameswar Rao and Vinod Kumar issued notices to the Deputy Commissioner (refund) and the principal commissioner of Customs at the Air Cargo Complex (Import). The court has given them two weeks to file a reply and set the next hearing for April 8, 2026. InterGlobe's plea says charging Customs duty on these re-imports is unconstitutional and a double levy on the same transaction. The airline already paid the duty during re-import and also paid GST on a reverse charge basis for the repair service. Despite this, Customs demanded duty again, treating the re-import as a fresh import. Customs counsel opposed the plea, calling it premature. The issue is still before the Supreme Court, which has not stayed the matter. They requested more time to file their reply. InterGlobe noted that the Customs tribunal had previously ruled against charging duty twice on such re-imports. Though the government later amended the exemption rules, the tribunal decided that the changes would apply only from then onward. The airline paid the disputed duty under protest on over 4,000 bills of entry, totaling more than ₹900 crore. When it applied for refunds, Customs rejected these claims, saying reassessment of each bill is needed first.