Hello aspirant,
According to josaa, if you get a seat in nit, gfti or iiit you can report to the nearest nit,gfti or iiit and if you get a seat in iit then you have to report to your nearest iit, so yes if you have been alloted a seat in nit rourkela you can go for document verification at BIT mesra.
Hope it helps.

hello ankit 

you can definitely report to bit mesra or any other josaa affilated college near to your location for reporting .

you can go through the list of josaa centres.

https://engineering.careers360.com/articles/josaa-reporting-centres

all the best

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