Why you want to issue new certificates is not clear. In any case, stamp duty has to be paid on all share certificates (whether splitted, duplicate etc.), though the rate of duty may differ in each case. Pl check provisions of your State Stamps Act.
If you are able to collect all old certificates, there is no need to give notice to shareholders. You can cancel old certificates and issue new ones by just passing board resolution. However, folio and distinctive numbers will remain same. Only certificate nos. will change.