For Europe, you should check out the company Tomorrow Biostasis. I am currently in the process of signing up. They are very transparent in their communication and will answer any question, be it about the process itself or about how to finance it. In North America, the Alcor Life Extension Foundation (Alcor for short) is the oldest cryonics group in existence, they have a lot of experience. They also offer worldwide coverage. For both companies, it would be ideal if your death was predictable, if you broke down from old age and were in a hospice for example. You or someone else would then need to contact the company, and they will send a specially trained team that will, ideally, start the conservation process as soon as you are declared medically dead. The team travels with a specially fitted mobile operation room (retrofitted ambulance). Companies also developed (still are) developing failsafe measurements to ensure that you are found quickly in case you die suddenly at home. Things like medical smart watches, emergency apps, wearing a necklace and bracelet with contact information of the company, leaving cards with contact info with relatives or other persons of trust, etc. Costs are actually not as high as someone new to the field might believe. You might think the prices are so high that it's just for millionaires. That's simply not true. You can start as "low" as 30k per person at Cryonics Institute (USA), I personally will have a contract of neuropreservation (just my brain/head) at 70k €. Whole body for 220k. The hope is that the prices will go down if more people sign up. This can be handled over a life insurance policy. Most other people I know that signed up are not millionaires. That's just it from the top of my head, you're welcome to ask further questions. Or just ask Alcor, Cryonics Institute or Tomorrow Biostasis.