Where to send your Superhuman cancellation letter
Read the addresses on this page next to the full guide to cancelling Superhuman.
The addresses we hold
This page shows every mailing address we hold for Superhuman, starting with the one a cancellation letter should go to in San Francisco, 94104, and how to address the envelope so it arrives without a query.
Where the letter goesMailing address
Superhuman548 Market StSuite 39105San Francisco, CA 94104The head-office address for Superhuman, in California. ZIP code 94104.
How to address the envelope
Write the address as printed
The envelope reads 548 Market St, Suite 39105, San Francisco, CA 94104. Match the spacing and the box or street line exactly as printed.
Add your return address
Top-left, your own name and address. A return address is what the post office needs to send the letter back if Superhuman has moved.
Send it certified
Take the letter to a post office counter and ask for certified mail: you get a postmarked receipt and a delivery record. Keep the tracking number and check it until it shows delivered.
File the receipt with your copy
Keep your copy of the letter, the receipt and the delivery record in one place. The delivery date is the one to quote if the account is billed again.
Your letter to Superhuman
The request itself is short: Superhuman is asked to end the account, stop the charges and confirm in writing, with the account email, the plan or product name and the invoice or order number from your latest receipt where the brackets are.
[Your name] [Your street address] [City, State ZIP] [Your email address]
[Date]
Superhuman 548 Market St Suite 39105 San Francisco, CA 94104
To whom it may concern,
I am cancelling my account with Superhuman, account or member number [number], with effect from [date or "immediately"]. Please end every add-on and linked plan on this account at the same time.
Please stop all future charges to my payment method, remove my stored payment details, and send written confirmation of the cancellation and its effective date to [your email address].
Sincerely, [Signature] [Your printed name]
Keep reading
The full guide to cancelling this company, our letter template and the postal guides.
Let Postbye cancel Superhuman for you
We write your letter, mail it by certified mail the next business day, and confirm when the cancellation went through. You keep the signed proof.