In General, promo code is not case sensitive even while used in Olo and should work as long as correct code is used regardless of case.
However, there is a possibility of using some conversion at backend. To get this confirmed, need to contact the Olo.
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This additional disclaimer will be removed upon formal review of this article. The standard Punchh Inc. KB Disclaimer still applies, and can be found at: https://support.punchh.com/hc/en-us/articles/360040100273-Punchh-Inc-Knowledge-Base-Disclaimer
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