Section 33C(2) in The Aadhaar (Targeted Delivery of Financial and Other Subsidies, Benefits and Services) Act, 2016
(2)A person or entity in the Aadhaar ecosystem aggrieved by an order of the Adjudicating Officer under section 33B, may prefer an appeal to the Appellate Tribunal within a period of forty-five days from the date of receipt of the order appealed against, in such form and manner and accompanied with such fee as may be prescribed:Provided that the Appellate Tribunal may entertain an appeal after the expiry of the said period of forty-five days if it is satisfied that there was sufficient cause for not filing it within that period.