Do All Siblings Need a General Idea of Where the Documents Are?

Don't be jealous of your siblings. Make sure that indeed your parents have discussed everything with that sibling. If you don't tell them the details about your finances, it's like giving them the car keys, but not telling them how to drive the car. Do all siblings need to have a general idea of where the documents are? I think it's a good idea because if something happens to one sibling, then the other family members should know where to find those documents.