How To Prevent Adding Duplicated Record In A Table Using VBA

I need to prevent adding duplicated record in a table .. I attach sample file
I input date on the left.. when I click a button, the range of records are copied and added to the table .. I need to check if the record has been added before adding it .. The duplicated record is a combination of name and date .. the same account should not be entered twice in the same day .. I appreciate your help .. thanks

Hi

Use this function to identify the duplicate.

Code:

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Function ISDUPLICATE(ByVal ExeDate As Date, AccountName As String) As Boolean

    Dim k  As Variant, i As Long, d As Long
   
    AccountName = LCase(AccountName)
    d = CLng(ExeDate)
    With Worksheets("EXEC Plan")
        k = .Range("s6:t" & .Range("s" & .Rows.Count).End(3).row).Value2
        For i = 1 To UBound(k, 1)
            If k(i, 1) = d And LCase(k(i, 2)) = AccountName Then
                ISDUPLICATE = True
                Exit Function
            End If
        Next
    End With
   
End Function

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and in your sub use it like

Code:

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If ISDUPLICATE(CDate(Range("b6").Value), Range("c6")) Then Exit Sub

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Thanks ..
This worked perfect !! .. I appreciate your help thank you very much !!