Issue of Share Certificates

one company has 3 share holders. shares alloted in 3 times for ex. 05/06/2011, 30/10/2011, 31/03/2012.

share certificate will provide till now, is correct or not?

share certificate filled individually or only one certificate. give answer?

which date mention in share certifacate?

how to show premium amount in share certifacate?

please clarify??????????????