Cancel your Aon subscription by mail
Aon deals with cancellations through the post, so the request goes in a letter and the certified-mail receipt is your proof of when. Letters to Aon go to Rotterdam, Netherlands.
Let Postbye cancel Aon 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 Aon.
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- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel Aon by mail
Get your account details together
Start with the policy number, the name on the policy and the date you want cover to end, so the request to Aon names the right account the first time.
Set out the request
Postbye writes the letter in Dutch from our Dutch template, because Aon's address is in Netherlands. It opens with the subject line “Onderwerp: annuleringsverzoek – [your name]” and asks Aon to end the subscription, stop all further charges and confirm in writing.
Send it by certified mail
Post it by certified mail to Aon in Rotterdam, Netherlands, using the exact address below, and note the tracking number.
Keep the proof of delivery
It shows the date Aon received your letter. Check your next statement: no Aon charge should post after the cancellation date.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your Aon cancellation letter goes
Written requests to Aon go to Postbus 518, 3000 AM Rotterdam, Netherlands.
“Postbus 518” is a post-office box or mail-sorting line, so it takes post and not couriers: certified mail is the right way to reach it.
Your name, address and email appear in a short block labelled Accounthouder, Factuuradres in dossier and E-mailadres in dossier, under the greeting “Geachte heer/mevrouw,”.
Prefer to write it yourself? Use our letter template
Before you cancel Aon, check these
- Do not cancel until replacement cover starts. A gap in cover can be costly.
- Premiums paid in advance may be refundable for the unused period. Ask how it is calculated.
- Name each policy separately if you hold several, such as home and contents or two pets.
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel Aon 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 insurance or protection plan
Insurers cancel by policy and by effective date, so the request has to name the policy number and the date cover should stop, ideally after replacement cover is in place.
Putting the request in writing means there is a date on file for when you asked, which matters if a charge appears afterwards.
Aon cancellation at a glance
- How Aon accepts cancellations
- By mailed letter
- Mailing address on file
- Aon Postbus 518 3000 AM Rotterdam Netherlands
- Country
- Netherlands
- Letter language
- Dutch (template nl)
- Category (from the company name)
- Insurance & protection plans
- Added to the database
- June 3, 2026
- Data last checked
