If you've acquired a batch of lawfully printed stickers, there's nothing wrong with putting one of them on each of the cards. But avoid...

I've recategorized this question to increase the likelihood that your question will be answered by an attorney with pertinent expertise.

I've recategorized this question to increase the likelihood that your question will be answered by an attorney with pertinent expertise.

I've recategorized this question to increase the likelihood that your question will be answered by an attorney with pertinent expertise.

Have you considered sending a DMCA Takedown Notice to the host of the website?

In what capacity would you be "publishing" the photos? Where and how? From what you say, it sounds like the photographer, rather than the...

Assuming it was not a work made for hire, the author automatically owns the copyright. I don't see that you said whether the article was...

How much have you been paying for the Google listing?

Last time I looked, the Copyright Office took weeks or months to complete processing of a registration.

I've recategorized this question to increase the likelihood that your question will be answered by an attorney with pertinent expertise.