Follow these steps to turn on/off SMS notifications:
Step 1 - Select Settings in ShopeePay Homepage.

Step 2 - Tap on “SMS Notifications” under ShopeePay Settings.

Step 3 - Toggle SMS Notifications.

⚠️Note
To manage Shopee App notifications, please refer to this article.
Alternatively, go to the Me tab via Shopee App > Select the ⚙ Setting icon > Select Notifications Settings manage Shopee App notifications.