Cancel your Telmex subscription by mail
Telmex deals with cancellations through the post, so the request goes in a letter and the certified-mail receipt is your proof of when. Our database has Telmex's mailing address in Ciudad de México, Mexico.
Let Postbye cancel Telmex 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.
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Postbye is not affiliated with Telmex.
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- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Telmex by mail
Note your account details
Have the account number, the phone number or service address being cancelled and the name on the account to hand. The details in the letter need to match what Telmex has on file.
Set out the request
Telmex is based in Mexico, so the letter goes out in Latin American Spanish, built from our Latin American Spanish template. Subject line: “Asunto: Solicitud de cancelación – [your name]”. It asks for the subscription to end, for further charges to stop and for written confirmation.
Mail it with tracking
Address the envelope to Telmex, Ciudad de México, exactly as printed in the next section. Certified mail gives you a tracking number and a delivery record.
File the delivery record
Keep the tracking record with your copy of the letter. If Telmex 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 Telmex cancellation letter goes
For a letter to Telmex, use Av. Parque Vía, No. 198, 06500 Ciudad de México, Mexico.
The postcode 06500 belongs to CDMX, Mexico, so this is where the envelope is delivered.
The letter greets the reader with “A quien corresponda:”; your own details sit under the labels Titular de la cuenta, Dirección de facturación registrada and Correo electrónico registrado.
Prefer to write it yourself? Use our letter template
Before you cancel Telmex, check these
- Ask for a final bill in writing and return any rented equipment by tracked mail.
- Check for an early-termination fee or a remaining equipment balance before the cancellation date.
- If you are moving to another provider, keep the line active until the new service works, then cancel.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel Telmex 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 phone or internet plan
Phone and internet providers tie cancellation to contracts, equipment balances and notice periods, so the request should name the exact line or service and ask for a final bill in writing.
A phone call leaves nothing behind; a letter leaves a copy, a date and a delivery receipt.
Telmex cancellation at a glance
- How Telmex accepts cancellations
- By mailed letter
- Mailing address on file
- Telmex Av. Parque Vía No. 198 06500 Ciudad de México Mexico
- Country
- Mexico
- Letter language
- Latin American Spanish (template es-419)
- Category (from the company name)
- Phone & internet
- Added to the database
- July 1, 2026
- Data last checked
