almost all the states have gone online in issuing the C-forms. Many have used the Digital Signature, and the Invoices are printed in the C-forms. In this context how relevant is the concept of Triplicate copies, like Original, Duplicate, and the Counterfoil.
Since in most of the states, the printing of the forms is done after online approval by the Sales tax Department, any number of copies can be printed.
In my view the loss of C-forms and the Indemnity procedure and Rule G is irrelevant. If the C-form is lost, it can be printed again and authenticated by the Purchaser.