Cancel your Flow subscription by mail
Flow takes cancellation requests by mailed letter, so a dated certified-mail letter is the record that counts. The cancellation address on file for Flow is in Alphen aan den Rijn, Netherlands.
Let Postbye cancel Flow 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.
Money-back guarantee within 10 business days.
Postbye is not affiliated with Flow.
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- 3 Flow cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Flow by mail
Start with your account details
Start with the name and email on the account and, if you have one, an account or customer number, so the request to Flow names the right account the first time.
Write your request
Postbye writes the letter in Dutch from our Dutch template, because Flow's address is in Netherlands. It opens with the subject line “Onderwerp: annuleringsverzoek – [your name]” and asks Flow to end the subscription, stop all further charges and confirm in writing.
Send it by certified mail
Address the envelope to Flow, Alphen aan den Rijn, exactly as printed in the next section. Certified mail gives you a tracking number and a delivery record.
Save the tracking record
Keep the tracking record with your copy of the letter. If Flow bills you after the date it received the request, you have the dates to point to.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your Flow cancellation letter goes
The mailing address we hold for Flow is Postbus 75, 2400 AB Alphen aan den Rijn, Netherlands.
“Postbus 75” is a post-office box or mail-sorting line, so it takes post and not couriers: certified mail is the right way to reach it.
The database also lists Colectora Panamericana Este 2011, Piso 2, Oficina 202, C1609 Boulogne, Argentina for Flow. Use the first address above unless your agreement names this one.
Your name, address and email appear in a short block labelled Accounthouder, Factuuradres in dossier and E-mailadres in dossier, under the greeting “Geachte heer/mevrouw,”.
Prefer to write it yourself? Use our letter template
Before you cancel Flow, check these
- Write well before the next billing date. A request that arrives after it can leave one more charge on your statement.
- If an app store or phone carrier bills you, the company cannot cancel it. Cancel with that partner as well.
- Cancelling usually ends access at the end of the period you paid for, so you keep what you paid for until then.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel Flow 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.
How cancelling by mail works
Subscriptions renew automatically, and a written request is the clearest record that you asked to stop it before the next billing date.
A letter is the formal route: it states the request in writing, carries a date and, sent by certified mail, comes with proof of delivery.
Flow cancellation at a glance
- How Flow accepts cancellations
- By mailed letter
- Mailing address on file
- Flow Postbus 75 2400 AB Alphen aan den Rijn Netherlands
- Second address on file
- Flow Colectora Panamericana Este 2011 Piso 2, Oficina 202 C1609 Boulogne Argentina
- Country
- Netherlands
- Letter language
- Dutch (template nl)
- Added to the database
- June 3, 2026
- Data last checked
