Because this identifier is highly specific, a "full feature" typically refers to the , such as the date of issuance, the entity that authorized it, and the specific procedure (e.g., a tax refund, an environmental certificate, or a legal document) it corresponds to.
: Institutional systems like the SAT (Mexico) or SEDEMA often generate these unique strings to identify specific digital vouchers, declarations, or certified files.
: It acts as a "fingerprint" to ensure the file downloaded is the original version and has not been tampered with.