Stored Procedure

Dear Support,

I have a problem on assigning Batch Serial number  ,my question is how can i put a validation on my sales order that the batch serial number assigned in my last item is equal to project or maybe  equal to NumAtCard. please see my screenshot below for your reference.

if batch serial number is not equal to NumAtCard theres a message saying your Batch Serial Number is Not Equal to NumAtCard

or

if batch serial number is not equal to Project  there's a message saying your Batch Serial Number is Not Equal to Project

Thank You

Regards \

Silent