score:3
So you lost your ID and it’s possible that shady people have learned that a certain person (you) exists and if they were to impersonate someone, they might as well use a real person. However, they’re aware that you’ll apply for a new document and this particular one would become invalid. Thus they could have forged a document with your data but with a fake number and sent someone into Milan from Ukraine for more shady things. Until careful inspection of your document confirms it’s genuine, this hypothetical situation is indistinguishable from what actually happened, thus investigation is warranted.
Upvote:1
The document number is checked too. Sometimes an ID card number is linked to a Social Security number therefore the replacement card will have the same number as the lost/stolen card. In those instances the Officer will consider the date of issue of the replacement card to ensure it post dates the reported loss/theft. Sometimes a national ID card will have the same alpha/numeric sequence as another nation's passports, so the Officer will consider the type of document reported lost/stolen and the document being presented. In addition the Officer will question the document holder to allay or confirm suspicions.