Your questions (actually all 3 that you posted till now - all are about validations) are very unclear.
If you want to check something, then you should actually know what you want to check and for what reason.
Your questions unfortunately do not give any information about this and they sound like you neither know what you want to check nor where to check. It rather looks like a question from a recruiter for which you had no answer in an interview.
And I would like to point you again to Veselina's reply in your other question Matching Sales Invoice with the Bill of lading
What is your role? Consultant, key user, auditor, job seeker? Who tasked you with problems like in this question: Validation testing for G/L Deposit Date for Cash Activity