In almost all countries there are specific standards of protection (commonly called Social protection) workers, who seek to avoid that these may be in distress and exclusion in the event they suffer injuries or illnesses, temporary or permanent, which prevented them to perform tasks in their respective jobs. However, sometimes a certain component of fraud, no corresponding allegations expressed by the worker about his inability to work with his true state of health is given in this type of ailments or diseases. Although for the most part this type of conduct so little honest can be fought through exams and timely medical check-ups, sometimes there are cases in which fraud gives its fruits, which could mean heavy losses both for their companies and for the public system of health and Social protection. Put this phenomenon in data, in a country like Spain they usually detect a year by agencies managers Social security around 5,500 sick leave of a fraudulent nature, not including in this alarming figure, obviously, those data that are not detected. How fraud detection takes place and what might be its signs? The Social security agencies of different countries have in their structures inspection teams medical who is responsible to carry out medical examinations for workers in a situation of temporary low to determine the reality of their State as well as the evolution of the same. It should be talk of various signs that could make suspicious at first about the fraudulent nature of an alleged injury or illness, and which might require be extremara surveillance:-when, after the alleged accident happen, gave contradictory testimony for part of those who suffered. That could be necessary to conduct a review in depth about the status of the worker. -If there was any witness that witnessing the incident.

-When the drop occurs shortly after the worker would have been made indefinite or fixed by the company. -In the event of a worker who suffered it submit discrepancies or were immersed in a personal confrontation with the company situation, for example by having been denied a promotion. In these cases you could think of sick leave as revenge, especially when the level of activity in the installation is larger. Injuries and illnesses that often give more commonly present in this type of action in deceit by some workers to a greater extent in these cases of fraud the temporary disabilities are those motivated by:-common diseases, such as flu or bronchitis. -Occupational injuries, such as lumbago, the cervicalgia or other ailments from bone or muscle type. -Type psychological or psychiatric diseases, such as stress or depression. These cases are those which are of greater complexity, be very complicated determine the veracity of the status of the worker.