It’s great that we have Facebook, WhatsApp and various social media tools to keep in touch with friends and family. However, the legal system has not yet evolved to allow every matter to be handled online. Knowing your family members’ physical addresses is vital to certain important legal matters, such as probate of a Will or conveyance of property via intestacy.
It may be wise to have at least one family member designated as the “registrar” of family information — at least one registrar for each group of siblings. The registrar can keep written record of names, residence addresses, phone numbers, email addresses, etc.; and that information may even be stored in the cloud.
Ideally, there should not come a situation where one sibling has gone off on his or her own for one reason or another, and no one knows how to get in to contact with him or her.