Yes, you can apply for a duplicate GATE CSE scorecard if you lose the original one. Here's a detailed explanation of the process:

1. Contact the GATE Organizing Institute:
If you have lost your original GATE CSE scorecard, the first step is to contact the GATE Organizing Institute. They are responsible for conducting the exam and issuing the scorecards. You can find their contact information on the official GATE website.

2. Request for a Duplicate Scorecard:
Once you have contacted the GATE Organizing Institute, you need to request a duplicate scorecard. You can do this by submitting a written application along with the necessary documents, such as your GATE registration number, name, and proof of identity. It is advisable to mention the reason for requesting a duplicate scorecard, i.e., loss of the original one.

3. Pay the Required Fee:
There is usually a fee associated with obtaining a duplicate GATE scorecard. The exact amount may vary, so it is recommended to check the official GATE website or contact the GATE Organizing Institute for the current fee structure. You will need to pay this fee, either through an online payment portal or by a demand draft, as specified by the institute.

4. Provide the Necessary Documents:
In addition to the application and fee payment, you will also be required to submit certain documents to support your request for a duplicate scorecard. These documents may include:

- Copy of the FIR (First Information Report) filed for the lost scorecard, if applicable.
- Affidavit stating the loss of the original scorecard.
- Proof of identity, such as a copy of your Aadhar card, passport, or any other government-issued identification document.
- Any other document specified by the GATE Organizing Institute.

5. Await Processing and Dispatch:
Once you have submitted the application, fee payment, and necessary documents, the GATE Organizing Institute will process your request for the duplicate scorecard. This may take some time, depending on the institute's procedures and workload. Once the duplicate scorecard is prepared, it will be dispatched to your registered address.

6. Download Provisional Scorecard:
While you wait for the duplicate scorecard to be dispatched, you can download the provisional scorecard from the GATE Online Application Processing System (GOAPS) website. This provisional scorecard can be used for most purposes until you receive the duplicate scorecard.

7. Contact the GATE Organizing Institute for Further Queries:
If you have any further queries or need assistance regarding the process of obtaining a duplicate GATE CSE scorecard, it is recommended to contact the GATE Organizing Institute directly. They will be able to provide you with accurate information and guidance.

Remember:
- It is important to report the loss of the original GATE CSE scorecard as soon as possible to initiate the process for a duplicate scorecard.
- Keep copies of all the documents you submit for your own records.
- Be patient during the processing period, as it may take some time to receive the duplicate scorecard.