It has nothing to do with RYO per se. Most states have some kind of Other Tobacco Products Tax. In many states it is quite high, Illinois for example is 20%or 27 % added at the register. If you order from out of state you don’t pay that tax. But Iwan Ries, located in Chicago, has to report all sales made out of state to the Illinois Department of Revenue. They then share that information with other states, as I explained in detail above, which I have done in other threads as well. I am a retired tax attorney, so what I have said is accurate, absolutely nothing new, and is not a state secret. Reports are that sometimes it takes a year or two after the purchase from a reporting state for the state you reside in to send out such letters. Many come with a bill which already includes interest and penalties, no warning, here is a return envelope for your convenience
Moral: know your states laws on tobacco products, particularly if you live in a state with a high other tobacco products tax. Ordering from out of state may simply not be in your best interests. If there is a defense to one of these demands, it is unknown to me. I have started making a list of states that I have seen these letters from, they include Illinois, Michigan, Wisconsin, and New Jersey. There are others I have seen but that was before I started keeping track. Effectively the feared interstate ban on ordering tobacco is already in force if you live in one of those states.