Uscis Travel Document What Does DOCUMENT OTHER THAN CARD OR TRAVEL DOCUMENT MAILED TO APPLICANT As Case Status In USCIS I-130?

What does DOCUMENT OTHER THAN CARD OR TRAVEL DOCUMENT MAILED TO APPLICANT as case status in USCIS I-130? - uscis travel document

My husband received an email from the USCIS on our I-130, the status of files. Do not understand what you mean .. Does this mean I need more from us? This does not mean that we deny the rights? Because if they would be received by a communication on the challenge.