Collect the complete decision and annexes, proof of service, application, submissions, minutes, evidence and legal-remedies notice. Add the complaint, administrative court decision or order and any later decision.
For the damage, collect invoices, payment records, contracts, accounting documents, refusals, deadline records and other evidence. For each item, explain its connection with the decision. A list of expenses alone does not establish causation.
Finally, prepare a short chronology and distinguish established facts from open questions. This allows the legal assessment to identify quickly whether a remedy is still available, whether state liability may be relevant and which documents are missing.