Most 300 or 400 level courses would require students to satisfy the prerequisite requirements. 
The process to waive the prerequisites is explained in your myOswego account when you go to register for courses: 
Once you have selected a course to take you will click the “Non-Degree Student Temporary Prerequisite Registration Waiver” link on the Registration tab 
Select the proper term
Enter the CRN for that course and choose "Add"
Confirm that you are requesting a prerequisite waiver for the course
Choose "Add class"
Choose "Acknowledged" 
Then you will need to register for the course. 
Note: The prerequisite waiver will not actually register you for the course (you must complete the waiver and register).
If you followed the process but failed to waive the prerequisite errors, it's possible that you have other errors as well. In this case, students should follow the required steps to resolve those errors in order to register for classes (continue to follow the page). 
When students did everything to waive the prerequisites but fail to satisfy the requirement, students can reach out to their advisors. Advisors or instructors will be able to submit the online Prerequisite Deviation. 
Please refer to the email template below when you reach out to your advisor regarding the prerequisites. Along with the email, please attach the transcript and explain what courses you took in your home institution correspond to the prerequisite(s) of the class your want to register for.

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