Vixen
Penultimate Amazing
The legal terms used in court are convict/guilty or acquit/not guilty. A court will never declare someone "exonerated" if/when they are found not guilty. Further, to be exonerated means to be found innocent after previously having been found, or assumed to have been, guilty. If someone is indicted for a crime, goes to trial and is acquitted, it would not be proper to consider them an exoneree as they were never previously considered guilty.
But in truth none of that really matters. The real point here is you made the claim one can not be considered an exoneree unless they have a "Certificate of Exoneration". Forgetting for a moment the incorrect usage of exoneration in the name of this State of Illinois certificate, you offered no evidence to suggest this certificate was required in order to be considered an exoneree. And certainly what the State of Illinois does has no bearing on someone would was exonerated of a crime in Italy.
You can obtain exoneration by one of two methods:
1. You receive a pardon from the state.
2. You apply (petition) for it.
US law is predicated on the British one, so the Wisconsin rules for getting a 'certificate of exoneration' will be pretty similar, if not the same in the US and the UK.
In the UK it is called 'quashed'.