We have posted a 30 day notice to vacate the premises, of our trailer?
Its really as much your responsibility as it is the management to have copies of relevant documents. The new landlord is asking for that information because its trying to verify your history. And theyre asking you because youre the one who wants to move. Perhaps its the offices job to locate your paperwork. But youve been asked for it, and its correct to assume that you (as the tenant in the park and as the applicant for the new property) you have your paperwork.