Mutual Credit Clearing

Decentralized Monetary Protocol

A monetary protocol in which participants extend credit to one another bilaterally through a shared ledger maintained by a third party, with the sum of all account balances structurally constrained to zero. Each transaction simultaneously credits one party and debits another. Prototypes: Sardex (Sardinia, Italy) for institutionalized B2B mutual credit; Local Exchange Trading Systems (LETS) for community-scale implementations.

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Details

License Closed source (Sardex proprietary platform); open variants exist for LETS.
Dev Status 🟢 Active
Dev Status Detail Released — Sardex serves over 4,000 SMEs; numerous LETS networks operate globally.
Owner Sardex S.p.A. (Sardinia, Italy); LETS networks operated by local communities globally.
Country Italy (Sardex); global (LETS networks).
Start Year 1983
Stack Proprietary platforms (Sardex); diverse implementations for LETS networks including community-run software.
Funding Sardex: private investment, member fees, transaction revenues; LETS: typically volunteer-operated.
Last Investigated Jul 1, 2026

Use Case Domains

Platform Evolution & Sovereignty

Decentralized Monetary Protocol Attributes

Origins Mutual credit revival; Linton's original LETS specification; subsequent institutional development for B2B by Sardex.
Data Formats Bilateral transaction ledger formats; account balance records; member directories.
Terms Membership-based (Sardex requires membership fees); free or cooperative for most LETS.
Funds Sardex has raised undisclosed private capital across multiple rounds.
Based On Original LETS architecture by Michael Linton; Sardex extends and institutionalizes for B2B; Dini and Sartori's institutional analysis.
Permissions Member admission required; credit limits set per member based on trade history.
Smart Contract No — traditional ledger implementations; blockchain variants exist as separate category.
Development Tools Sardex proprietary tooling; community tools for LETS (e.g., Cyclos, Community Forge).
Protocol Maturity / Standardization Production-grade; over forty years of LETS operational history; Sardex extensively studied academically.
Trust Framework Bounded-trust mutual; community membership; credit limits enforced by ledger keeper; institutional reputation.
Target Application Domain Local economic resilience; B2B credit clearing; community currencies; alternative finance during economic stress.
Game-Acceptance Position Modify-Additive — designed for indefinite coexistence with national currency.
Accumulation Regime Structurally limited — sum of balances is zero; net accumulation impossible by design.
Coordination Mechanism Bounded-trust mutual — peer-to-peer credit extension within community.
Issuance Model Peer-to-peer — bilateral credit extension creates and extinguishes units.
Value-Signal Type Single unit, often pegged to national currency for accounting clarity.
Federation Pattern Nested hierarchical — federation through nested credit commons and intercommunity protocols.
Substrate Independence Institutional / off-chain native; software-supported but substrate-neutral specification.