Cancel your GPTZero subscription by mail
To end a GPTZero subscription you write to them: GPTZero handles cancellations by post. Our database has GPTZero's mailing address in New York, United States.
Let Postbye cancel GPTZero 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 GPTZero.
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- 2 GPTZero cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel GPTZero by mail
Collect the details you need
Put the name and email on the account and, if you have one, an account or customer number in front of you before you write: the request to GPTZero is only as good as the details it quotes.
Put the request in writing
State plainly that you want the GPTZero account cancelled, further charges stopped and a written confirmation sent to you. Postbye sets this out in a ready English template (“Subject: Subscription termination – GPTZero”).
Send it by certified mail
Address the envelope to GPTZero, New York, exactly as printed in the next section. Certified mail gives you a tracking number and a delivery record.
Hold on to the receipt
It shows the date GPTZero received your letter. Check your next statement: no GPTZero charge should post after the cancellation date.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your GPTZero cancellation letter goes
GPTZero can be reached by post at 33 Irving Pl, New York, NY 10003.
New York is in New York (ZIP 10003), a domestic address for certified mail within the United States.
The database also lists Irving Place 33, New York 10003 for GPTZero. Use the first address above unless your agreement names this one.
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
Every address we hold for GPTZero, with the envelope wording
Before you cancel GPTZero, check these
- Look for annual or multi-month plans. A plan paid in advance usually runs to the end of the period you paid for.
- 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.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel GPTZero 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
Most subscriptions keep billing until someone tells the company to stop, and a dated letter is proof that somebody did.
Putting the request in writing means there is a date on file for when you asked, which matters if a charge appears afterwards.
GPTZero cancellation at a glance
- How GPTZero accepts cancellations
- By mailed letter
- Mailing address on file
- GPTZero 33 Irving Pl New York, NY 10003
- Second address on file
- GPTZero Irving Place 33 New York 10003
- Country
- United States
- Letter language
- English (template en)
- Added to the database
- April 30, 2026
- Data last checked
