Digital Legacy Association

The Digital Legacy Association helps you to plan and leave clear instructions on what would would like to do with your online accounts and records in your name when you die.  Your accounts may include: email, social media, to online shopping, chat and gaming. It can include any accounts where your information is stored or shared on the internet.

They run training for and have free resources that you can download. If you use one of their templates it will be a statement of wishes and not a legally binding document.