There are many schools that use the name "Marwin" or have similar names. Indiana doesn't automatically accept diplomas from all schools; acceptance depends on accreditation status. A diploma from a regionally accredited high school will generally be accepted, while one from a non-accredited or unaccredited online school might not be.
To know for sure, you need to:
1. Specify the exact name and location of the Marwin High School you're asking about.
2. Check the school's accreditation status. Look for accreditation from a recognized regional accrediting agency (like the North Central Association Commission on Accreditation and School Improvement, for example) or a state-approved accrediting agency. The school's website should list this information.
Once you have that information, you can contact the Indiana Commission for Higher Education or the relevant Indiana college or university admissions office to verify acceptance.