What is a blockchain voucher: a revolution in aid distribution

UncleLiquidation · 2026-02-12T16:00:48+00:00

The essay discusses the evolution of vouchers in the context of digitalization, highlighting the Spanish Red Cross's innovative RedChain system that uses blockchain technology to distribute aid efficiently and transparently while maintaining recipient privacy.

UncleLiquidation

2026-02-12 16:00:48

Abstract generation in progress

In the context of digitalization in the social sector, the question “what is a voucher” takes on new meaning. While previously a voucher existed only as a paper document or prepaid card, today the Spanish Red Cross demonstrates how blockchain is transforming this tool. The organization has launched RedChain—a next-generation aid distribution system that completely reimagines the process from donation to aid delivery to those in need.

Evolution of Vouchers: From Physical Documents to Digital Tokens

Traditional vouchers require physical production, storage, and distribution, creating logistical challenges. RedChain addresses this issue by replacing paper vouchers and prepaid cards with digital tokens compliant with the ERC-20 standard on the Ethereum blockchain. Such a voucher exists as a digital code that recipients can use via a mobile wallet by scanning a QR code at partner merchants. This means charitable aid becomes more mobile, faster, and accessible.

RedChain: An Innovative Aid System Architecture

Developed with the support of BLOOCK and Billions Network, the system employs a hybrid approach. Personal data and transaction history of recipients are stored in a secure off-chain system maintained by the Red Cross itself. Simultaneously, a public blockchain is used to verify key elements of each transaction: hashes, timestamps, and cryptographic proofs of integrity. This architecture ensures transparency in the movement of donated funds, allowing donors to see that their contributions have reached their intended recipients.

Balancing Transparency and Privacy

One of RedChain’s main features is achieving transparency without compromising privacy. Vouchers operate anonymously on the blockchain, while personal information of recipients remains protected within the organization’s centralized systems. Beneficiaries can freely spend aid at partner locations without revealing their identity. This approach demonstrates that modern technologies enable charitable organizations to be both transparent for oversight and responsible toward aid recipients.

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