Viewing the person’s profile on the app will allow you to see how they added you on Snapchat. Follow these steps to accomplish this:
Tap the profile symbol in the top-left corner of the Snapchat app after it is open.
After selecting “Add Friends,” select “My Friends.”
Find the person you wish to know how they added you and touch on their name to access their profile in the list of friends.
To check how somebody added you as a friend on Snapchat, click the “Added Me” button on the person’s profile.
You can see how someone added you as a buddy on Snapchat by visiting their profile and selecting the “Added Me” button. You can do this by entering your username, scanning your Snapcode, or calling in.
To sum up, you can check how someone added you on Snapchat by visiting their profile on the app and selecting the “Added Me” button. You may see how somebody added you as a buddy on Snapchat by looking up your username, scanning your Snapcode, or using your phone number.