Hi,
To cancel your “Thank You Emails” app follow these steps:
1. Login to eBay.
2. Go to “My eBay” > “Applications”.

2. Under applications, choose “Thank You Emails”.
3. On the right choose “other actions” and “unsubscribe”.

4. Next click on “Yes” to confirm your cancellation.
We would love to hear your feedback & suggestions for improvement, so feel free to comment below.
Best,
-Tzipi