copy right notice on sold picture?

[ghosh]

Hello,
i think it would be nice to get advice from you before i go into reality. I am designing a site through which I am going to sell picture. After making a lot of searches I have decided to sell pictures with/without frame. i would appreciate if you could help me out with the following question;

1. Where do I mention copyright notice in a sold picture? Should I do it at the back of the picture itself or should I paste a label or just add a paper with copyright notice with the delivery package?

Please help me out, I have no idea how the majority of the professionals do.

thanks
Ghosh

[PhotosGuy]

Costco will print the copyright notice on the back of the print & I include the rights notice & © at the bottom of my invoice.

[ghosh]

Thanks a lot