Cancel your UltraAV subscription by mail
For UltraAV the route is a written letter: cancellation requests are taken by post, and certified mail shows when yours arrived. Our database has UltraAV's mailing address in Boston, United States.
Let Postbye cancel UltraAV 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 UltraAV.
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- 2 UltraAV cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel UltraAV by mail
Note your account details
Start with the account or subscription number, the email the plan was bought with and the address or devices it covers, so the request to UltraAV names the right account the first time.
Put the request in writing
State plainly that you want the UltraAV account cancelled, further charges stopped and a written confirmation sent to you. Postbye sets this out in a ready English template (“Subject: Subscription termination – UltraAV”).
Mail the letter with a receipt
Post it by certified mail to UltraAV in Boston, United States, using the exact address below, and note the tracking number.
Hold on to the receipt
Once the letter is delivered, the date on the receipt is the date UltraAV 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 UltraAV cancellation letter goes
UltraAV takes its post at 250 Northern Ave, 3rd Floor, Boston 02210, which is where a cancellation letter belongs.
ZIP code 02210 places the address in Massachusetts, in the United States.
Inside, the salutation reads “To Whom It May Concern,”, followed by your details under Name, Address and E-mail.
Prefer to write it yourself? Use our letter template
Every address we hold for UltraAV, with the envelope wording
Before you cancel UltraAV, check these
- Monitored plans can run on a fixed term. Check your agreement for the end date and any early-termination fee.
- Software plans may auto-renew a few days before the term ends. Send the request ahead of the renewal date.
- Ask for every product on the account to be cancelled, including add-on devices and extra protection tiers.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel UltraAV 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 security or identity-protection subscription
Security subscriptions often auto-renew and monitored plans can sit on a fixed contract term, so it matters when the request reaches the provider and whether it covers every device or location.
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.
Start on ultraantivirus.com: the account area there shows who actually bills you, which decides who the request must reach.
UltraAV cancellation at a glance
- How UltraAV accepts cancellations
- By mailed letter
- Mailing address on file
- UltraAV 250 Northern Ave 3rd Floor Boston 02210
- Country
- United States
- Letter language
- English (template en)
- Website
- ultraantivirus.com
- Category (from the company name)
- Security & identity
- Added to the database
- August 21, 2026
- Data last checked
