Yes, you can participate in spot allotment for a merit lower-fee seat in a Government Self Financing Engineering College even if you have already been allotted a merit full-fee or management seat through KEAM (Kerala Engineering Architecture Medical) counseling. Here’s how it typically works:

1. Vacant Seats : During spot allotment, seats that were not filled during the initial counseling rounds or have become vacant are offered to eligible candidates. These may include lower-fee seats.

2. Eligibility : To participate in the spot allotment, you need to ensure that you meet all the eligibility criteria specified by the admission authorities. This generally involves paying attention to deadlines, documents required, and any specific instructions provided for the spot allotment process.

3. Procedure : If you are interested in switching to a lower-fee seat, you will need to register for the spot allotment process as instructed by the KEAM admission authorities. Make sure to follow the official guidelines and procedures for participation.

4. Seat Acceptance : If you secure a lower-fee seat in spot allotment, you will have to forfeit your previously allotted seat. Ensure that you understand the implications of this decision, including any financial or academic impacts.

Always check the official KEAM website or contact the admission office for the most accurate and detailed information related to the spot allotment process and your specific situation.

hope this helps you!!