Calle launches BitNotes, a multi-mint Cashu wallet that prints ecash on paper

Announced on October 22, 2026, BitNotes represents a novel approach to digital cash by allowing users to print ecash tokens as physical paper notes. These notes can be verified offline using the mint's public keys before redemption, addressing concerns about connectivity in regions with limited banking infrastructure.

The wallet is built around the Cashu ecash protocol, which operates on Bitcoin. It handles both digital transfers and physical note generation, with the latter featuring tamper-evident design to detect any unauthorized alterations. The app also integrates with Lightning Network for fast payments and uses Ark for on-chain Bitcoin conversions.

Multi-mint approach

A key feature of BitNotes is its multi-mint capability, which spreads risk across several independent mints like 28MINT. Users can route transactions through different mints and automate swaps between them to enhance payment reliability. This design reduces dependence on any single operator while maintaining the need for trust in the system.

Targeted adoption

BitNotes appears designed for users in regions with thin banking infrastructure. Features like offline verification, physical notes, and a Mobile Money bridge for Rwandan Francs specifically target people who may lack reliable connectivity or traditional bank accounts. However, the introduction of physical cash brings familiar risks: notes can be lost, damaged, or stolen.

Currently available only on Android and macOS, the project is in early stages with no disclosed security audits or adoption figures. Early users should probably start small with meaningful amounts until more information becomes available. The next developments to watch include audit results, growth in independent mints, platform expansion, and real-world usage of the Mobile Money bridge.