According to the Oregon Hereford Sale Catalog , "7Z" is the tattoo identification for this specific animal. In the cattle industry, "paper" refers to the official or pedigree papers issued by a breed association (such as the American Hereford Association) that proves the animal's lineage and ownership.
If you are looking for the physical or digital registration papers for this specific cow: Delilah.7z
The reference to appears in the context of livestock registration for a Polled Hereford cow named AR MS DELILAH 7Z . According to the Oregon Hereford Sale Catalog ,