It's mainly for the convenience of the government to contact one of the customers who is infected with Covid-19, isolate him quickly, and then track the people who have had contact with him.

This is a targeted strategy adopted by European countries in response to the second outbreak. The enterprises targeted this time are mainly restaurants and cafes, because people always have to eat. Now, even if the epidemic is serious, many European countries have resumed the business of the catering industry. However, this measure in European countries has also caused great potential risks, because there is no way to wear masks when eating, which increases the risk of virus and infection. Therefore, in order to take countermeasures against this risk, European neighboring countries require people to leave contact information when eating in restaurants.

Like Belgium and Germany, this measure has been implemented now. Belgium requires all customers who go to eat to fill out a form, either leaving their own e-mail or their own phone number. If customers refuse to fill out the form, restaurants will not let them eat, which is mainly for the sake of the epidemic and the passengers who eat. This measure has been implemented in Belgium for more than two months. After it seemed to be going well, Germany also implemented this measure. After that, France saw that other countries had implemented it so smoothly, and with the recommendation of experts and medical staff, France will also implement this strategy.

However, the implementation of this strategy in France is not so smooth, because according to French customs, we can know that there is no habit of asking customers to fill out forms when dining in France. Even in China, no one has to fill out a form before going to eat, which is very troublesome for those customers. For example, I just went to buy a cup of coffee, and then I will go to work soon. As a result, you asked me to fill out the form, which delayed my time. Maybe this time I filled out the form. Although many governments have said that if the customer shows no signs of infection after two weeks, the information will be deleted, but many people do not cooperate.