Hello Ankit,
the CCNP certification is achieved when you pass all the required exams.
Congratulations for passing the Route exam! But if you still need to pass other exams to achieve CCNP there is no documentation for having passed the CCNP Route exam only.
You may access the Cisco certification tracking system and you can take a snapshot of the Certification progress page that wil show that you have passed the CCNP Route Exam.
This is not true documentation, but may be enough to demonstrate you have passed the Route exam.
Good luck for your studies!
Hope to help
Giuseppe
