Cancel your Dewu (Poizon) subscription by mail
Dewu (Poizon) takes cancellation requests by mailed letter, so a dated certified-mail letter is the record that counts. Post for Dewu (Poizon) is handled in Shanghai, China, which is where your letter is headed.
Let Postbye cancel Dewu (Poizon) 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 Dewu (Poizon).
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- 3 Dewu (Poizon) cancellations handled this month
- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Dewu (Poizon) by mail
Note your account details
Before writing, collect the name and email on the account and, if you have one, an account or customer number. Dewu (Poizon) can only act on a request it can match to an account.
Write your request
The request is prepared in Chinese (template zh), under the subject line “主题：取消请求 – [your name]”: end the subscription, stop all further charges and confirm in writing to you.
Mail it with tracking
Use certified mail for the 200083 Shanghai address in the next section, so the post office records the delivery. Write down the tracking number.
Hold on to the receipt
Once the letter is delivered, the date on the receipt is the date Dewu (Poizon) 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 Dewu (Poizon) cancellation letter goes
Dewu (Poizon) lists 上海市虹口区中山北一路121号B6-2005室, 200083 Shanghai, China as its mailing address.
The envelope is going to Shanghai, China, so the postcode 200083 must be on the front.
Inside, the salutation reads “相关负责人：”, followed by your details under 账户持有人, 存档的账单地址 and 存档的电子邮件地址.
Prefer to write it yourself? Use our letter template
Every address we hold for Dewu (Poizon), with the envelope wording
Before you cancel Dewu (Poizon), check these
- Use the same name and email as on the account. A mismatch can delay the request.
- Check your next statement: no charge should appear after the cancellation date.
- Look for annual or multi-month plans. A plan paid in advance usually runs to the end of the period you paid for.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel Dewu (Poizon) 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.
A phone call leaves nothing behind; a letter leaves a copy, a date and a delivery receipt.
Dewu (Poizon) cancellation at a glance
- How Dewu (Poizon) accepts cancellations
- By mailed letter
- Mailing address on file
- Dewu (Poizon) 上海市虹口区中山北一路121号B6-2005室 200083 Shanghai China
- Country
- China
- Letter language
- Chinese (template zh)
- Added to the database
- September 29, 2026
- Data last checked
