Cancel your Monitronics Security subscription by mail
For Monitronics Security the route is a written letter: cancellation requests are taken by post, and certified mail shows when yours arrived. Letters to Monitronics Security go to Glendale, United States.
Let Postbye cancel Monitronics Security 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 Monitronics Security.
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- 2 Monitronics Security cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Monitronics Security by mail
Collect the details you need
Have the account or subscription number, the email the plan was bought with and the address or devices it covers to hand. The details in the letter need to match what Monitronics Security has on file.
Set out the request
Ask Monitronics Security to cancel the account, stop all further charges and confirm in writing. Postbye prepares the letter from our English template, with the subject line “Subject: Subscription termination – Monitronics Security”.
Mail the letter with a receipt
Send it certified to Glendale, United States, copying the address from the next section letter for letter, and keep the receipt slip.
Keep the proof of delivery
File the receipt with the letter. A Monitronics Security charge dated after delivery is the one to dispute, and these two documents are what you quote.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your Monitronics Security cancellation letter goes
Written requests to Monitronics Security go to 3450 N Verdugo Rd, Glendale, CA 91208.
Glendale is in California (ZIP 91208), a domestic address for certified mail within 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 Monitronics Security, with the envelope wording
Before you cancel Monitronics Security, 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 Monitronics Security 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.
Monitronics Security cancellation at a glance
- How Monitronics Security accepts cancellations
- By mailed letter
- Mailing address on file
- Monitronics Security 3450 N Verdugo Rd Glendale, CA 91208
- Country
- United States
- Letter language
- English (template en)
- Category (from the company name)
- Security & identity
- Added to the database
- April 30, 2026
- Data last checked
