In an initiative to provide a platform for those seeking information or contact number of missing, found or sighted children, the government of India has launched a unique website called Khoya Paya
Source: Khoya Paya
This website can prove to be one of the most effective medium to communicate with the missing child's family and also the person who might have spotted the child somewhere at a public area.
As you visit the website, you can see header messages that suggest what to do exactly if your child has gone missing. "It is mandatory for police to register FIR in case of missing child. You are advised to inform the nearest police station," a post reads on the website.