Would you point to where you found the non-copyrighted indication on their website?
This is what I find:
Using the FNMA URAR Form 1004 in an educational setting without explicit permission from Fannie Mae may still fall under "fair use" in copyright law, but this depends on several factors. Fair use typically allows copyrighted material to be used for purposes like teaching, research, or commentary, provided it doesn't harm the copyright owner's market or value. However, fair use is not guaranteed, and the specifics of how the form is used (e.g., whether it's reproduced in full or in part, and the context of its use) are critical.
To be certain, it's best to consult Fannie Mae directly or seek legal advice to ensure compliance with copyright laws. Let me know if you'd like help finding more resources!