If you're getting spam registrations from malicious entities or bots, you can stop this by adding a Captcha or Antispam plugin to your registration. The majority of captcha plugins are also compatible with MarketKing's Vendor registration.
We have specifically tested MarketKing with the following captcha plugin and we can confirm they work together correctly:
Depending on the mechanism used by the captcha plugin, it will add a verification mechanism, the most common one being the "I'm not a robot" check:
