How do you know if someone left you Bitcoin after death?

[Jawhead999]

You can check some projects like Criptoro, Keys.Casa, etc.

I don't recommend to use that service since it's expensive, take a look with Keys.Casa the inheritance services only available for Casa Diamond clients [1] which they charge $5000 per year. What I see they only manage and teach someone to use Bitcoin, while they only use multisig for the inheritance. Creating multisig wouldn't cost you anything, you can read some guide to create it.

[1] https://keys.casa/bitcoin-inheritance-plan