You have to keep safety in mind during an emergency situation. With that in mind, you need to verify people’s identity before answering the door. This is the case, even if you are expecting someone to come. If you are expecting someone from a business to come to your home, you can use your camera phone to ensure that the person actually represents the business. This will prevent people from getting into your home on false pretenses. That can save your belongings and your life.
Simply take a picture with your camera phone and email it to the company in question. Then, have the person verify the employee. Once verified, let the person inside of your home. If the company does not verify the person, do not open the door.
You can never be too careful during an emergency situation. Your camera phone is a great way to protect yourself.