You’ll notice there are 2 different functions there, one disabled the check when the user trying to register people is logged out, the other disables the check for all registrations.
You can add either to a custom functions plugin and we have some documentation on creating one here:
The support post ‘Main registrant unable to to use additional attendee emails.’ is closed to new replies.
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Support forum for Event Espresso 3 and Event Espresso 4.