Out school does not even have that paper. In fact, none of the school in the Europe will be willing to show any paper like that to others.The best way is to tell them that they can see the video where the compnies come to the school. Also tell them that for the first set of students we will only take 4 students, like this they can see that we are serious about what we can offer.With only 4 people, we are train the students by losing money, but I will accept 4 students to show my honesty and willing for cooperation