Code validation system (pincodes, QR, alphanumeric) without the need to pre-store remittances. A code structure + checksum formula is agreed upon with the production line or printing. OmniCodex validates each code mathematically in real-time — format, checksum, and uniqueness — only storing codes that have already been redeemed (zero pre-storage). Compatible with industrial inkjet printing, GS1, and QR generation with HMAC-SHA256 for anti-fraud. Includes triple capture: QR scanning, manual entry, and photographic OCR with automatic resolution of ambiguities (0/O, 1/l).