How can i identify the fake IPs ?

I am getting many fake IPs but I want to sure that so that I can take any actions.

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IP address spoofing, or IP spoofing, is the forging of a source IP address field in IP packets with the purpose of concealing the identity of the sender or impersonating another computing system. Fundamentally, source IP spoofing is possible because Internet global routing is based on the destination IP address.

Thank you for the information.

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