The government has decided to give GST refund to exporters in the bank accounts they have filed with the customs department and not in those they have mentioned in the GST registration forms.
The Central Board of Excise and Customs (CBEC) said it has asked exporters to align their bank account details declared to the customs with that of GST regime.
Under the GST rules, refund is to be credited in the bank account mentioned in the registration particulars. Besides, exporters have been declaring details of bank account to customs authorities for the purpose of drawback etc.The CBEC said that there is a possibility that bank account details available with the customs department do not match with those declared in the GST registration form.

Source - https://timesofindia.indiatimes.com