A tipping threshold can be set in Sales
A tipping threshold can be set in Sales using the following Sales32c.INI setting:
[Preferences]
TipAmountWarningThreshold=0.25
If it is set and the tip amount is greater than 25% the operator receives the following warning message when attempting to finalize, "Are you Sure? WARNING: You are attempting to finalize a sale with a tip greater than 25%. Proceed?"