What is how do i know if someone deleted their snapchat?

As an AI language model, I don't have access to personal information or data. However, there are a few ways to know if someone deleted their Snapchat account:

1. Search for them on Snapchat: If you cannot find their account when searching for their username or their name, it might be because they have deleted their account.

2. Check your friends list: If the person you are looking for was on your friends list, but their name no longer appears, it could mean they deleted their account or blocked you.

3. Ask mutual friends: If you have mutual friends with the person you are looking for, you can ask them if they have noticed the person's account is no longer active.

4. Try sending a message: If the person's account is deleted, you won't be able to send them any messages or snaps. If you try to send a message, it will not be delivered.

It's important to note that there could be other reasons why you cannot find someone's Snapchat account. They might have simply changed their username or blocked you from seeing their account.