How to refuse a photography agency to send photos to friends?

You can take the following steps to refuse the photography agency to use your photos in the circle of friends:

1. Check the contract: Check the contract you signed with the photography agency to make sure that there is no clause that allows them to post your photos on social media without your consent.

2. Clarity: Before shooting, communicate with the photography agency and tell them clearly that you don't want them to post your photos on social media without your consent.

3. Reservation right: add a clause in the contract, which clearly stipulates that you reserve the right to publish photos, and require the photography agency to obtain your explicit permission before publishing photos.

4. Revocation of permission: If the photography agency has published your photos on social media, you can ask them to delete them immediately and revoke their publishing rights.

5. Seek legal help: If the photography agency refuses to comply with your request, you can consider seeking legal help, such as consulting a lawyer or complaining to relevant agencies.

Please note that these steps may vary by region and specific circumstances. If you need more specific advice, please consult your local lawyer or relevant institutions.