thank you JHB for your help
If DLookup("Telegram_Number", "tbl_Violation_Of_Building", "Telegram_Number Like " * " & Forms!frm_Add_Violation_Building!Telegram_Number & " * " And Telegram_Date = #" & Format(Forms!frm_Add_Violation_Building!Telegram_Date, "yyyy/mm/dd") & "#") Then
i did it...