Can I send data to be pre-filled in the form on Instamojo page?
Yes, you have to append the link with the data that you want to pre-fill.
Consider that your link is instamojo.com/SampleUser/SampleLink.
If you have to pass the name and email ID of the user to be pre-filled.
Name: Jerry Seinfeld
Email id: firstname.lastname@example.org
Here is the link that the user should can be referred to: