Where to send your Know How cancellation letter
Read the addresses on this page next to the full guide to cancelling Know How.
The addresses we hold
One place for Know How's mailing addresses: the Amsterdam delivery point for a cancellation letter first, then the rest of what the database holds, with envelope wording that matches.
Where the letter goesMailing address
Know HowPostbus 236201100 EC AmsterdamNetherlandsThe Netherlands address on file for Know How. Postal code 1100 EC.
How to address the envelope
Copy the address exactly
The front of the envelope carries Postbus 23620, 1100 EC Amsterdam, Netherlands and nothing else in the address block. Check the 1100 EC digit by digit before it goes in the post.
Put your own address on it
Print your return address in the top-left corner. Without it, an undeliverable letter is simply lost instead of returned to you.
Buy the certified service
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.
Keep what the post office gives you
Your copy of the letter, the mailing receipt and the tracking record belong together in one file.
Your letter to Know How
The request itself is short: Know How is asked to end the account, stop the charges and confirm in writing, with the name and email on the account and, if you have one, an account or customer number where the brackets are.
[Your name] [Your street address] [City, State ZIP] [Your email address]
[Date]
Know How Postbus 23620 1100 EC Amsterdam Netherlands
To whom it may concern,
I am cancelling my account with Know How, 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 Know How 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.