Hello Aspirant,

As per the official, It is important that candidates claim the reservation criteria will have to produce necessary documents as proof of their reservation. 

Economically Weaker Section has 10% reservatin percentage, You should have a valid proof to claim the reservation, These proofs have to be carried by the candidate during counselling procedure.

You can also refer the below given link for teh information.

https://engineering.careers360.com/articles/jee-main-reservation-criteria

Good Luck!