Documentation
Merchant Presented QR Code Encoding Specification
Support Documentation Data Coding
Data Coding

For the Merchant-Presented QR Code, all the data must be encoded using Byte Mode. If the Merchant-Presented QR Code includes characters other than Alphanumeric Special, then it must include an ECI mode indicator and ECI Designator, where the ECI Designator includes the binary representation of an ECI Assignment number equal to 000026, to indicate UTF-8 encoding.

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