After Applying for GST Cancellation GST dept. can send you Notice for Seeking Additional Information / Clarification / Documents relating to Application for Cancellation, and in this notice GST Dept will ask for reason for GST Cancellation and Consent letter to department for discharging GST liability, if any arises in future.

Here you can download Letter format for “Consent letter to department for discharging GST liability, if any arises in future.”