The first ever premium paid receipt for sbi life insurance will be received with the policy kit right when the policy is dispatched.
The subsequent premium paid receipts can be generated from sbi's online portal Here. Click on this link and you will be directed to a page where you're required to feed in your policy number. Once done; you will get the details of the premiums paid for your policy. You can download it and get a printed copy of it to serve it as the evidence when required.