First register with Google reCAPTCHA v3 and link your domain. It is advisable that a specific Google account be created and owned by a relevant person in the business.
Go to: https://www.google.com/recaptcha/admin/create, enter your details, select reCAPTCHAv3 as the reCAPTCHA type, and submit.
Google – Registering a New Site
Once you have registered, you will be provided with two reCAPTCHA keys, a ‘SITE KEY’ and a ‘SECRET KEY’.
Google – Keys
Next, use the site and secret keys to set the corresponding SY parameters.
RECAPKEY is the site key.
RECAPSEC is the site secret key.
Copy and paste the relevant keys and save.
NOTE: This enables the reCAPTCHA functionality on COINS login. To disable, simply blank either of the two keys.
RECAPMRK is your watermark; this determines when to throw an error. The higher the watermark, the stricter validation. For example, if Google returns a score of 0.7 and your watermark is 0.7 or greater, a BOT WARNING will be thrown. Enter a decimal value between 0.0 and 1.0 to select your threshold. Note: If blank then 0.5 will be used as default as advised by Google.