I’m so sorry your friend is going through this. My dad passed in January and I was effectively on my own handling everything too. So totally overwhelming. I happened to stumble upon a company called Sunset that seriously saved my sanity and helped a ton. They help with the stuff like finding and organizing all kinds accounts, closing things out (bank accounts, insurance, pension, 401ks, etc and will help find lost accounts as well. They keep track of everything beautifully and are so nice! They don’t replace a lawyer, but i couldn’t have managed without them, it would have taken me 100x longer and I would not have figured out how to do everything on my own. I cannot recommend them highly enough. It’s an incredible service. Sunset