Michael Lohan got a special delivery while he was rotting away in a Tampa jail yesterday -- dude got served with new legal papers from his ex-wife Dina ... who's demanding $11k in unpaid child support.
We thought the kids were all in their 30s by now ... apparently not.
Serves Jailed Michael --
You're Still a Deadbeat!
10/26/2011 2:30 PM PDT BY TMZ STAFF
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