How to use same site key and secret key for mulltiple domain contain same IP address.

How to use same site key and secret key for multiple domain contain same IP address. I do not want to put all domain into google recaptcha  domain list . I am using  Recaptcha v2  Please  provide u r suggestion  -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://bit.ly/1dkFnYd. For more options, visit http://bit.ly/P65DvS.