Scam for lowering your property taxes

I just received something in the mail so by chance you too might have received it. It is a rather official looking letter with a colored bar coded envelope that looks a lot like something we would receive from the tax assessor regarding property taxes. It states that I am possibly being over assessed by $211,976. Then it asks for $$ to have the house reassessed and save money on my property taxes. Here's the deal, the county has a form for you to send to the assessor to have your property reassessed if you think your home value has declined. Once you send the form in the reassessment is handled by the county at NO COST to you. The county annually adjusts our property taxes automatically, but if you live in an area that has seen a great deal of depreciation of value, it's fine to ask the county to reassess your specific home. This is happening a lot in our current housing market, especially if you purchased your home in 2004 or later. Do not send $$ in the little green barcoded envelope to have your taxes re-evaluated...this is a solicitation and nothing more.