EU regulations state that all alcoholic (and non) beverage bottles must carry a lot number in case of complaints and recalls. The trick is to find the number! It's usually on the neck of the bottle somewhere, but never on the label (in case the label gets wet and is lost). If you can't find it, then it's most likely to be under the capsule enclosing the neck and cork.
Once you've found the number, contact the distillery directly and ask them!
Image below is the lot number on a bottle of Highland Park I had nearby...
