Digital Tax Receipt using Internet Unique ID FLEXFIELD

Summary:

We are facing an issue with the standard flexible field for the "Transaction for Mexico" context—specifically the "Digital Tax Receipt using Internet Unique ID" field. Users can modify this field at any time, deleting data or copying incomplete values; since there is no character-count validation, the system allows this, causing problems for tax compliance and the stamping of payment supplements. Is there anything we can do to enforce validation ensuring the field always contains exactly 32 characters?

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