By default, recaptcha validation is disabled. To enable it, you must enter recaptcha public and private key to JamSession settings. Please follow the next steps:
1. Go to Appearance -> JamSession Settings
2. Select the General Options tab
3. At the bottom, insert recaptcha public key https://ihip.mohfw.gov.in/npcchh/ and recaptcha private key. You can sign up for recaptcha keys by following this link.