Cancel your Slack subscription by mail
Directly with Slack, the way to cancel is: Online. Notice rule: Choose whether the downgrade takes effect immediately or at the end of the billing period.
Let Postbye cancel Slack 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 Slack.
- 4.8 from 2,931 reviews
- 2 Slack cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Slack by mail
Collect the details you need
You will need the account email, the plan or product name and the invoice or order number from your latest receipt. Use exactly the details Slack holds, so the request can be matched to your account.
Write your request
Postbye turns the request into a finished English letter headed “Subject: Subscription termination – Slack”: close the Slack account, stop every charge and reply in writing.
Send it by certified mail
Post it by certified mail to Slack in San Francisco, United States, using the exact address below, and note the tracking number.
Keep proof the letter arrived
Keep the tracking record with your copy of the letter. If Slack 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 Slack cancellation letter goes
Slack can be reached by post at 500 Howard St, San Francisco, CA 94105.
With ZIP 94105, the address sits in California and the letter never leaves the United States postal system.
Your name, address and email appear in a short block labelled Name, Address and E-mail, under the greeting “To Whom It May Concern,”.
Prefer to write it yourself? Use our letter template
Before you cancel Slack, check these
Notice period: Choose whether the downgrade takes effect immediately or at the end of the billing period. Work out your cancellation deadline.
- Only Workspace Owners and members who upgraded the workspace can change or cancel the paid plan, via Admin > Manage billing
- Billing cycle can be switched between monthly and annual at the same screen
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel Slack 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.
Cancelling a software or app subscription
Software plans are billed per plan or per seat, often yearly, and the app store version is billed by the store rather than the developer, so the request has to name the plan and who bills it.
Putting the request in writing means there is a date on file for when you asked, which matters if a charge appears afterwards.
Slack lets you cancel directly (online). A letter is the fallback that leaves a dated record when the direct route fails.
Slack cancellation at a glance
- How Slack accepts cancellations
- Online
- Mailing address on file
- Slack 500 Howard St San Francisco, CA 94105
- Country
- United States
- Letter language
- English (template en)
- Category
- Software & apps
- Checked against
- Verified on
