Hi @Imran Sayeed Generally speaking, all materials in your course should be either created by yourself or used with permission from the rights-holder unless you believe the use falls under fair use.
We encourage you to check out our InstructorTerms of use our Intellectual Property Policy as well as our trust and safety policies for a bunch of useful information.
In case you feel in doubt, please reach out to policy@udemy.com they will be able to provide you more details.
Eliana Cerna
Udemy Community Team
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