If you have set up reCAPCTHA, you cannot order services via API BILLmanager. Accessing the billing system via API will give the error that reCAPTHA validation failed. To integrate BILLmanager with a website with reCAPTCHA, add a script into the website header (inside the <head> tag) and use the same keys as for the billing system configuration.
To get the reCAPTCHA keys for your domain, please go to the service web-page.
How to add reCAPTCHA to your website
Add the following script into the <head> tags on every page with the BILLmanager sign-up form:
The reCAPTHCA script
<!-- Google reCAPTCHA-->
<script async src='https://www.google.com/recaptcha/api.js'></script>
CODE
Add the reCAPTCHA field on the BILLmanager sign-up form on the website: