Hello,
It depends on the centres. Few centres may be a bit lenient. Few centres may be strict. Try contacting tspgecet regarding this. You can find the contact details in the link mentioned below-
https://pgecet.tsche.ac.in/UI/ContactUs.aspx
Good Luck!

Hi Nikhila,

Yes, in such a case you can show your transaction slip and for a safe side submit an application too mentioning about your issue and wrote that as soon as you get for original certificates you will submit them in the college. 

Also, talk to the respective college athourities to give to extended time to resubmitt your certificates later on.

Good luck.