Live & Let Live ...
I'm a libertarian, and if it doesn't affect me directly, its none of my damn business
+1Probably the best thing to to is contact the county assessor's office (or whoever handles property taxes where you are) and let them know of your observations. But it is up to them to do any investigations and take any action.
+1
It may or may not be a violation of the law. I think people cheating on their taxes is everyone's problems. I think sending a letter (perhaps anonymously) should be the extent of your involvement.
I think there was a similar thread recommending MYOB when employees were stealing from employers. This jist was "If Management is too stupid to see things right under their nose, then they deserve to be stolen from and I'm not going to report anything myself."
.. Snip...
However, recognize that there is some risk that if the neighbor finds out that you brought your suspicions to the attention of the authorities that they will likely be made as hell (keep your car in the garage if you have one).
+1+1
It may or may not be a violation of the law. I think people cheating on their taxes is everyone's problems. I think sending a letter (perhaps anonymously) should be the extent of your involvement.
Gaming the system, whether avoiding taxes (property, income, excise, liquor, sales, etc), fees, entitlements, etc is deemed a near professional sport in these parts.
Should I report my neighbor who drives 20 minutes to NH to avoid MA sales and liquor taxes? Or the guy who registers his car in NH but lives in MA to avoid sales, excise and registration fees? Or the folks who are getting multiple EBT cards and selling them for cash? What about the ones with multiple bankruptcies who buy all kinds of "stuff": cars, boats, houses with zero intention of ever paying for them? Or the older people who 'self impoverish' in order to get Medicaid pick up the nursing home tab? Or the guy who just won $2,000 off a bookie? What about the guy "working under the table" who collects unemployment?
At what point do you pick up the phone?
I am all for the over 65 exemption but I doubt it was intended to subsidize two healthy, employed 30-somethings with a lot of kids (if they are in fact abusing it).