I use one particular key most of the time, but I have 3 others (one is a valet key). If I have more than one key detected it triggers a message to that effect.
If I need to drive the car for some reason with more than one key present, do I just ignore the message or do I need to acknowledge it somehow?

I ask because I expect to sell the car and will convey all the keys at that time, perhaps driving it the buyer, for example.