The production of functional false identities in GLMZ is not a craft operation conducted in basements—it is a distributed industrial process requiring coordination across at least seven distinct technical specialties. A complete 'full-stack legend,' as practitioners call a fully operational false identity, requires fabricated biometric registration in the Civic Identity Ledger, a plausible subdermal implant history, a coherent neural interface usage profile extending back at least four years, housing and employment records consistent with a Tier 2 or Tier 3 citizenship classification, and at minimum two human contacts who will corroborate the identity under direct investigation. The cost of a credible full-stack legend on the open market, as estimated by the Meridian Security Consulting Group's 2182 threat assessment, ranges from 180,000 to 400,000 civic credits depending on tier depth and implant history complexity.

The weakest link in most fabricated identities is the neural interface usage profile. The city's ambient behavioral analysis infrastructure—operated by the Civic Data Compact on behalf of its corporate signatories—maintains rolling 90-day behavioral baselines for all registered citizens. An identity that was fabricated six months ago will show an anomalously clean profile: no petty purchase disputes, no late-night navigation queries, no minor health searches, none of the friction that characterizes lived digital existence. Sophisticated legend factories address this by running 'ghost accounts'—automated scripts that generate plausible low-level behavioral noise across the identity's data trail for months or years before the identity is activated for operational use. The Northgate Forgery Collective, dismantled in a Quorum Systems security operation in 2181, was running approximately 340 ghost accounts simultaneously at the time of its dissolution.

Physical biometric modification remains a parallel requirement. GLMZ's pervasive facial recognition mesh, managed through the Distributed Legibility Network, makes unmodified physical appearance operationally dangerous for any long-duration cover. The modification spectrum runs from non-surgical options—subdermal filler injections that subtly alter facial geometry, corneal pigmentation overlays, gait-modification physical therapy—to full surgical restructuring offered by unlicensed clinics in the sub-tier districts of Calumet Shelf and the Irongate Undercroft. Notably, surgical modification affects facial recognition but does nothing to alter gait signatures, which the DLN began incorporating as a secondary identification modality in 2180, catching several operatives who had invested in facial surgery but not in the considerably more difficult process of relearning how to walk.

State-level actors—primarily the remnant agencies of the reconstituted Midwest Compact government operating out of the administrative enclave in Gary Annex—maintain their own legend factories that produce identities of substantially higher quality than commercial operations. Compact-produced legends include genuine historical data insertion: actual school enrollment records, utility registrations, and civic participation logs that were written into legacy databases during the period when those systems were less rigorously audited. These 'deep-seeded' identities are effectively undetectable through standard automated verification and require human investigative effort to surface. They are, consequently, reserved for the highest-priority intelligence placements and are not available commercially at any price.