Check to see if your child took his things with him – clothes, bags, mobile (if it’s been left behind, check the chip is still in it), toilet bag. That will let you see if a note has been left for you. See if your child has taken his identity documents with him or if he has his travel pass or the ability to pay for travel..
Make sure someone is always at home to answer the phone in case your child tries to contact you.
Keep searching even after reporting the disappearance to the Police. Your active involvement is vital. You know your child and his habits better than anyone. Lots of parents find their child themselves. Look in places your child usually goes – places where he likes to be alone, fast-food restaurants, at a boy/girlfriend’s, shopping centres, stations etc.