Hello @sinobest ,
are you geeting spam registartion on your website ?
your question is not clear can you add some mre information?
and if you want to prevent spam registartion in your website
There are some solutions you can implement to prevent spam account registration in Magento2.
1. Enable Magento captcha from store configuration
Magento 2 provides facility to enable Captcha in some default Magento forms.
You can find the following setting: Stores -> Configuration -> Customers -> Customer Configuration -> CAPTCHA -> Forms.
Here you can select forms where you want to enable captcha.
2. Enable the confirmation email
Enable the email confirmation : System > Configuration > Customer Configuration > Require Emails Confirmation > Yes
Magento provides limited form's captcha, for custom form either we need to custom code for Magento captcha or you can add google captcha. Google Captcha is one of the best way to prevent spams.
Every time if the bot is running from the same IP, then block that IP from your .htaccess file.
for more information refer below link
https://www.emiprotechnologies.com/technical_notes/magento-technical-notes-60/post/prevent-spam-acco...
https://magecomp.com/blog/stop-or-prevent-spam-registrations-magento-2/
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