I was thinking about such a system also, but it has some serious drawbacks:

• I need to connect to it regularly. Auto login is of course not an option, that defeat the purpose. So, which service/stuff am I using that could be this switch? I see any.
• time limit to send the message is also tricky. 2 weeks is too long imo, they may need some info about insurances sooner. And 2 weeks is already short, as you need to authenticate to the switch

So, as a farewell message why not, but I would not trust such system to deliver in a tilely manner information that they need.