Digital Asset Infrastructure Operator

Stefano D. Zingg

Stablecoin settlement · Treasury operations · Institutional client coverage

UnionBlock operated as a distributed U.S. and LATAM stablecoin settlement network connecting corridor partners with a centralized U.S. operating layer for compliance, banking, liquidity routing, treasury settlement, wallet controls, and reconciliation.

UnionBlock processed $302,991,770 in documented principal volume across 2,769 transactions and 292 customer IDs across U.S. and LATAM corridors.

Miami · New York
Target roles: Payments Operations · Trading Operations · Stablecoin Partnerships · Treasury Operations · Compliance Operations · Institutional Client Coverage

$302,991,770

Documented principal volume

2,769

Documented transactions

292

Customer IDs

10

Liquidity and institutional rail relationships

525

CIP form response records located

54

Wallet entries

Institutional stablecoin settlement at production scale

UnionBlock specialized in USDT to USD settlement and redemption workflows across high friction cross border corridors. The operating model connected local corridor partners with UnionBlock's centralized U.S. infrastructure for compliance review, liquidity routing, banking settlement, wallet controls, and reconciliation.

The operating record is supported by reconciled transaction books, banking records, public block explorer data, FinCEN registration records, counsel engagement records, and reference contacts available upon mutual interest.

Volume

$302,991,770

Documented principal volume across 2023 to 2026.

Transactions

2,769

Documented transactions, with preserved reconciliation records.

Clients

292

Customer IDs across documented U.S. and LATAM settlement corridors.

Average ticket

$109,423

Documented average ticket based on preserved transaction books.

Union Block LLC · Founder and CEO

Began in 2017 through Dige Zingg LLC with early stage token offerings named SAFTs and ICOs. Pivoted to OTC trading and restructured the business as Union Block LLC, a principal spot OTC desk with federal MSB registration. Built the company around institutional stablecoin settlement, OTC execution, treasury operations, and cross border payment workflows.

2017
Dige Zingg LLC founded
Invested in early stage token offerings named SAFTs and ICOs and later pivoted to OTC.
January 2020
Restructured as Union Block LLC (Delaware)
Principal spot OTC settlement desk with expanded operating infrastructure.
2021 to 2022
Cross border payment workflows built out
U.S. and LATAM corridor operations with BSA and AML program foundation.
November 2022
FinCEN MSB principal registration obtained
Formalized compliance function and operating controls.
2023
Peak operating year
959 transactions and $112.3M in documented volume.
2024
Sustained scale
$92,518,728 in documented volume with expanded institutional liquidity provider relationships.
2026
Orderly transition
Closed new customer onboarding in mid 2025 and managed an orderly transition through 2026 based on banking pressure and margin compression.

Federal MSB registration · BSA and AML controls · Counsel reviewed program

UnionBlock operated under a federal MSB compliance framework, supported by external legal counsel and compliance infrastructure.

FinCEN MSB Registration

Principal operator registration (Money Transmitter), initially registered November 2022 and renewed January 2026. Registration number on request.

Compliance Intake Discipline

Onboarding discipline reflected 525 CIP form response records and 292 customer IDs in transaction books. Conversion followed documentation readiness, risk review, activity, and commercial fit.

BSA and AML Program

CIP, KYC, KYB, beneficial owner review, OFAC screening, adverse media review, risk based transaction monitoring, recordkeeping, and escalation workflows.

On chain Monitoring

Chainalysis KYT supported wallet screening, transaction monitoring, and counterparty risk workflows.

External Counsel

Nelson Mullins (AML/CTF policy review, Aug 2023) and Perkins Coie LLP (OTC money transmission and licensing assessment, Sept 2023).

Compliance Function

Designated Chief Compliance Officer (hired and overseen by the principal) with analyst support; the principal led commercial client onboarding as the first compliance layer.

Regulatory Record

Federal MSB operating record supported by public registry confirmation and counsel reviewed documentation.

Institutional liquidity, banking, and compliance relationships

UnionBlock coordinated across stablecoin issuers, institutional OTC desks, market makers, exchanges, fintech rails, compliance vendors, external counsel, and banking partners.

Liquidity providers and institutional rails

Circle · Wintermute · Binance Institutional · Stillman Digital · FalconX · Kraken · 1Konto · Conduit · OpenFX · OSL

Banking partners

Lead Bank · Aion Bank · Customers Bank

Compliance and legal infrastructure

Chainalysis KYT · Sumsub · Perkins Coie LLP · Nelson Mullins

Evidence backed operating record

The operating record can be verified through multiple evidence layers:

  • FinCEN MSB registry confirmation
  • Public block explorer wallet activity
  • Reconciled transaction records
  • Banking and settlement records
  • Counsel engagement records
  • Liquidity provider and banking references
  • Corridor partner and client references

A diligence grade documentation package is available upon mutual interest.

Let's talk

Currently focused on institutional digital asset infrastructure roles across payments operations, trading operations, stablecoin partnerships, treasury operations, compliance operations, and institutional client coverage.

Miami · New York