Write down all the information you know about this person. Just looking for someone with the same name as him/her is probably too big. Therefore, you can narrow it down by entering the following information:

Full name and nickname (nickname)

Age and date of birth

school

Interests, hobbies and dislikes, team sports (especially at school)

workplace

Previous address and telephone number

Friends, family, neighbors

If you can't remember the exact name of this person, look for variants of his name or nickname. Every time you search, write down the different variants suggested by the search engine. Write down these two addresses and put a question mark on them. If you find another person who hints at this name at one of these addresses, remember to put a tick next to that address every time.

2. Ask people around you. Get in touch with people around you who know what you want (or you can introduce yourself to other people you know). Ask them the last time you saw this person, the last time you talked to him/her, or any personal information, such as email address or mobile phone number.

Be sure to indicate why you are looking for this person. They may not disclose any information to you to protect this person's privacy, but they will probably tell that person that you are looking for him/her, and this person may want to contact you. Leave your name and phone number to deal with this situation.

3. Call the police. Once you are sure that this person is really missing, report it to your local law enforcement department. It's a pity that many people go missing every day, so it's necessary to follow the rules to deal with this kind of thing.

Be sure to provide them with all the information about this person: age, height, weight, hair color, eye color, skin color, recognizable features, what he was wearing when he disappeared, etc. Give them a recent photo of this person and their fingerprints (if you have them).