A young child under the age of 10 should never be left alone at home. If you are of the proper age and are by yourself, you should not tell strangers who call that you are alone. There are different options you can use to answer that must be decided by your family. For example you could either let the phone ring if you have answering machine or voice mail or you could answer the phone and say I need to take a message because my parents cannot come to phone right now. You now have the option to discuss this topic, repeat this information or click to continue.