Hi there @que,
Welcome to the Community!
Many businesses are required by law to include a physical address in the footer of all email campaigns sent, like under the CAN-SPAM Act in the United States. Anti-spam laws exist to prevent people from sending unsolicited, fraudulent or deceptive emails. That means, as a legitimate email marketer, you must be transparent about your company or organization and the purpose of your email messages.
I’d recommend including a physical address in your footer to avoid any potential issues or penalties. However, if you do not want to disclose a specific physical address for security reasons, you can choose to use a P.O. box instead!
Thanks for participating in the Community!
-Taylor