Cancel your Affirm subscription by mail
To end a Affirm subscription you write to them: Affirm handles cancellations by post. Post for Affirm is handled in San Francisco, United States, which is where your letter is headed.
Let Postbye cancel Affirm 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 Affirm.
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- 3 Affirm cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Affirm by mail
Find your account details
Have the name and email on the account and, if you have one, an account or customer number to hand. The details in the letter need to match what Affirm has on file.
Prepare the letter
State plainly that you want the Affirm account cancelled, further charges stopped and a written confirmation sent to you. Postbye sets this out in a ready English template (“Subject: Subscription termination – Affirm”).
Post it with proof of delivery
Take the letter to the post office and ask for certified delivery to 94108 San Francisco. Keep the tracking number it gives you.
Keep proof the letter arrived
Once the letter is delivered, the date on the receipt is the date Affirm was told. Compare it with your statements over the next billing cycle.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your Affirm cancellation letter goes
Affirm can be reached by post at 650 California St, 12th Floor, San Francisco, CA 94108.
ZIP code 94108 is in California, so the letter stays inside the United States postal system.
Your details go in a block headed by Name, Address and E-mail, and the opening line is “To Whom It May Concern,”.
Prefer to write it yourself? Use our letter template
Before you cancel Affirm, check these
- Use the same name and email as on the account. A mismatch can delay the request.
- Check your next statement: no charge should appear after the cancellation date.
- Look for annual or multi-month plans. A plan paid in advance usually runs to the end of the period you paid for.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel Affirm 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.
Putting the request in writing means there is a date on file for when you asked, which matters if a charge appears afterwards.
Affirm cancellation at a glance
- How Affirm accepts cancellations
- By mailed letter
- Mailing address on file
- Affirm 650 California St 12th Floor San Francisco, CA 94108
- Country
- United States
- Letter language
- English (template en)
- Added to the database
- April 30, 2026
- Data last checked
