According to the facts I learned from the internet, the process is very simple. You just have to precisely follow the steps given and all will be done.

• Take all the required original documents which you need to send to WES.
• Take 2 sets of photocopies of these originals. 
• Register yourself at Pune University Network as a student.
• Choose the Third last option that is ‘Certificate Attestation’.
• Then enter all the Documents which you want to get attested. 
• Click the ‘Save and Next’ button and enter the number of envelopes required.
• Click ‘Save Envelope’ and then click ‘Back’. 
• Click on ‘Proceed to Print’ & choose your method of payment.
• Click on ‘Save and Print’. Download 2 files, ‘Application form’ and ‘Fees Challan’.
• Now go create an account at World Education Services and get your WES reference number after paying the fees online approx ?12,000.
• Get 2 prints of WES application form. Do not fill them now.

Now you will have the following things in hand before visiting the University: Set of Original Documents, 2 Sets of photocopies, Application form, Challan, WES Reference Number. But this is incomplete, as you will need to fill WES form. 

WES Form:

• Fill both WES forms that you have.
• Pay the required fees at the Bank counter.
• Then they will accept your full application containing Photocopies & WES form along with the paid challan. 

Visit after 8 days. Show the challan student copy. Check the documents for Sign and Stamp on all photocopies - including the WES form. Put all the documents inside including the WES form in the envelope, for being stamped.