Authentication of invoice

Dear Friends,

Three copies of invoice which is authenticated by Authorised Signatory.

1. Original copy of Buyer.

2. Duplicated for Transporter.

3. Triplicate for Assessee.

Can different authorised signatory signed in different copy in same invoice no.

example one authorised person has singned in Original copy, second authorised person has signed in duplicate for transporter copy and third signed in Triplicate in one invoice.

Is it possible.