As the seller, you have the keys until recording. The best thing to do is to leave the keys with the title company when you go to closing. Your friendly and courteous closing agent will keep the keys until it records then give them to the receptionist for the new buyers to stop by and pick them up. Any extra keys, shed keys, garage door openers, etc. can be left in the house on the kitchen counter. Many new home buyers change their locks, however it’s still important that you gather up all the keys and leave them with the new owners and they will make that decision.