What documents should be contributed with the resource?
When you get into the world of public tenders, sooner or later you can touch you to present a resource. What do you carry under your arm? Well, it depends on where you are and what kind of resource you want to put, but there are things that they will almost always ask you.
First, yes or yes, the copy of the notification or the decision against which you are complaining. And be careful, it is not worth a blurred photo or a "they told me that ...", it has to be clear what they told you, whether they disqualified you, they threw a penalty or ate the mandate with the award.
Then you have to prove that you are not a cast in the matter. That means: papers prove that you did participate in the tender. It can be your proposal presented, some mail that the commission sent you, whatever, but show that you have the right to kick.
Obviously, you have to write a good discharge. No letters with insults, huh. You have to explain well why the decision is wrong, citing laws, norms, all that legal mambo. Here, if you can, I put a lawyer in the middle, because you have to speak in legal language and not anyone handle with that.
Do you have evidence? To put them! Photos, documents, mails, reports, even memes if they are for your cause (well, that is not, but the point is understood). Everything that adds to show that your version is serious.
And if they leave you, you can add witnesses or affidavits of people who know something relevant. It is not mandatory everywhere, but sometimes adds.
Anyway, it is not turkey mucus of presenting a resource. There are deadlines, there are rules, and if you fall asleep in the laurels, chau resource. The best: talk to someone who knows the subject, do not send yourself alone without a network.
In short: they will ask you for notification of the quilombo, evidence that you have the right to claim, a good writing explaining your point, evidence that supports what you say and, if you paint, any witness or affidavit. Do not forget the deadlines or ask for legal help. Then don't say I didn't let you know.