WordPress at a glance
action is not described

lostpassword_post action-hook . WP 2.1.0

Fires before errors are returned from a password reset request.

Usage

add_action( 'lostpassword_post', 'action_function_name_9045', 10, 2 );
function action_function_name_9045( $errors, $user_data ){
	// action...
}
$errors(WP_Error)
A WP_Error object containing any errors generated by using invalid credentials.
$user_data(WP_User/false)
WP_User object if found, false if the user does not exist.

Changelog

Since 2.1.0 Introduced.
Since 4.4.0 Added the $errors parameter.
Since 5.4.0 Added the $user_data parameter.

Where the hook is called

retrieve_password()
lostpassword_post
WC_Shortcode_My_Account::retrieve_password()
lostpassword_post
wp-login.php 388
do_action( 'lostpassword_post', $errors, $user_data );

Where in WP core the hook is used

Usage not found!