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Might need to provide a bit more information as to why you are questioning the LMIA in the first place such as have you been dealing with a possible suspect agency/consultant ?
 
Did you pay money in exchange for the LMIA? Typically if you paid quite a bit of money - it's fake.
 
veenaren2814 said:
but i don't know to check in online whether LMIA is valid or not

It's not possible to check online.
 
I am Koley Partha from India. My passport number is P 4253152. My LMIA number is #73547. Am I passed or not?
This is a public forum and nothing to do with the Canada government or immigration so nobody here can help you with your question you need to contact IRCC directly.