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They cannot. They are required to report accurate information including a DOFD. Dispute the DOFD if missing, or inaccurate. If they verify the tradeline you can sue them for 1,000 dollars plus attorney fees, or something. Someone else can help explain that step, as I've never had to litigate.
Alternatively, if the DOFD is properly listed, contact the CRA and ask that the tradeline be removed due to the 7 year 180d thing.
The max time it can remain on file is 7.5 yrs from the DoFD. A new CA reporting on your CR has 90 days to supply the CRA with the DoFD and its the same one the OC uses. If its past 7.5 yrs and it comes back verified then you can file a CFPB complaint and ask for the 1K as remedy in addition to having them remove the TL. You need to have proof of the DoFD.