Looking on the internet deeply has found these results:

do it on urgent basis is the most popular phrase on the web.

do it at urgebt basis 10 results on the web	do it on urgent basis 123 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	Jul 20, 2015 ... Following students haven't completed the formalities as on 20 July 2015.They are advised to do it on urgent basis on 15 Aug 2015. Jun 29, 2015 ... Following students haven't completed the formalities as on 29 June 2015.They are advised to do it on urgent basis on 30 June 2015. If any modification of the delivered SAP model is required, we do it on urgent basis. At SSCSWORLD, we specialize in offering custom SAP development ... Jul 15, 2015 ... Following students haven't completed the formalities as on 30 June 2015.They are advised to do it on urgent basis on 15 JULY 2015.

do it at urgebt basis

10 results on the web

do it on urgent basis

123 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

Jul 20, 2015 ... Following students haven't completed the formalities as on 20 July 2015.They are advised to do it on urgent basis on 15 Aug 2015.
Jun 29, 2015 ... Following students haven't completed the formalities as on 29 June 2015.They are advised to do it on urgent basis on 30 June 2015.
If any modification of the delivered SAP model is required, we do it on urgent basis. At SSCSWORLD, we specialize in offering custom SAP development ...
Jul 15, 2015 ... Following students haven't completed the formalities as on 30 June 2015.They are advised to do it on urgent basis on 15 JULY 2015.