Invisible ink as advertisement

As a role of officer in security agency-

 

Gud evening, as we all know invisible ink is increasing the crime. Now a days it is making so many people fools. Take this as an example and learn how they are making people fool .

A few days ago A man came to a old man as a agent of insurance company. And inspired him to signed the papers .The old man read the papers carefully and signed the papers. After somedays a another man came in his house, and introduced himself as a employee of insurance company. He told that he came here to take the house papers .Then old man got to know that the first man fooled him by using the invisible ink. 

We should learn by this case and be aware this invisible ink.