Yes, Micropur does have an expiration date.
Micropur Forte & Micropur Classic:
You can find it printed on the bottom or the side of the package. There is also another number on the product; this is the so-called Lot Number, which has nothing to do with the expiration date.
Micropur MP1:
The expiration date for the 20 and 30 packs of Micropur MP1 tablets can be found on the very thin underside of the plastic on the packaging. It is printed on the white instructions. It can also be found stamped onto the crimping of each foil packet.