We’re using reCAPTCHA in our latest theme.
You can tick “Enable this key on all domains (global key)” so you can hard code this key into theme.
Sorry for late reply.
In my Brankic Admin Panel user can enter their key, but if they don’t my global key is used.
Yes, I’m using something like this, but I modified it to suit my needs.
Brankic1979, thanks, I appreciate your reply. Do you use your contact form like a page template or you use it in another way?
In my admin panel I have Contact page optionshttp://themeforest.net/theme_previews/1348607-zig-zag-responsive-wordpress-template?index=6
This is screenshot from my 1st version. Right now there is reCAPTCHA Yes/No select field and public and private API keys fields.
You can insert this contact form on any page.
I’ve noticed that 100% of users (who asked for support) are using this form instead of 3rd party plugin