Programming logic to convert mixed case alphas to all uppercase?

Our bank requires that our payroll checks have the Payee printed in all uppercase in order for us to utilize their PosPay Payee Validation service which compares the payee on the check to the payee in our PosPay file. All of our employee names (ALPH) are in mixed case and we want to avoid performing a mass db update because there could be impacts to interfaces, reports, etc if we change the case universally.

Has anyone used programming code to convert mixed case to uppercase in a JDE program? We already utilize a custom check printing program (a copy of R07231 named R5507231) so we have the flexibility of modifying code.