code: public function removeSubscriptions($intUser, $strMode)
  	{
  		if (!$intUser)
  		{
  			return;
  		}
  
  		// Delete or deactivate
  		if ($strMode == 'close_delete')
  		{
  			$this->Database->prepare("DELETE FROM tl_newsletter_recipients WHERE email=(SELECT email FROM tl_member WHERE id=?)")
  						   ->execute($intUser);
  		}
  		else
  		{
  			$this->Database->prepare("UPDATE tl_newsletter_recipients SET active='' WHERE email=(SELECT email FROM tl_member WHERE id=?)")
  						   ->execute($intUser);
  		}
  	}
docs: Remove the newsletter subscriptions of members who close their account
  
  @param integer $intUser
  @param string  $strMode