How do you locate shares of stock that were issued to you at an invalid mailing address?

Answer 1

search "transfer agent for _________ stock" that should provide you with a bank, i.e. Mellon, Bank of America, State Street etc. These banks are the trustees for publicly traded company's stock reporting and record keeping, they work in conjunction with DTC (Direct Transfer Center?) to hold shares in what is called electronic or book entry. They should be able to get you the necessary paperwork to have shares reissued or get you pointed in the right direction.

Answer 2

your question is not clear. do you mean share certificates in physical form?was it delivered to an invalid address? how is that
possible to deliver to a wrong person? or if you are not aware of
the fate of the certificate and not received it,write to the company
[with your folio and share certificate numbers] asking them to issue
duplicate certificate in physical form or to get it credited to your
demat account. for that you have to sign an indemnity bond. I have
answered this question with some presumptions. hope they will be
of help to you. further I would recommend you to post these types
of messages to www.moneycontrol.com since you can interact with
experts in this field and get their guidance. All the best!