Property Taxes owed by a Texas mineral rights holder?

[pat_k]

6. Yes.

Looking at a random county, Tarrant, it doesn't sound like anything is taxable until production of some kind is happening, but I could be reading this wrong:
https://www.tarrantcountytx.gov/en/tax/property-tax/FAQs-Property-Tax.html#:~:text=Mineral%20interests%20are%20defined%20by,as%20all%20other%20real%20property.

In any case, I would contact relevant county tax assessor collectors office. This does sound a little scamy. Seems to me that tax bills would have come from the tax assessor long before any lien would be filed.