Hide time card error / warning messages

Hi

We have recently made OTL go live. Employee time in and out records comes from machines or web clock. Some times machine data doesn't get into OTL due to integration issues due to which when ever employee sees his time card it shows error messages like "Value must be provided for start time / stop time." and one another message which I don't remember right now. Since these messages are highlighted in red box page full page of time card becomes like "Reddish". We want to hide these messages or want the system to do not show