E WAY bill is required when sale made to Unregistered person

E-way bill is an electronic way bill for movement of goods which can be generated on the GSTN (common portal). A ‘movement’ of goods of more than Rs 50,000 in value cannot be made by a registered person without an e-way bill.

E-way bill will be generated when there is movement of goods –

• In relation to a ‘supply’
• For reasons other than a ‘supply’ ( say a return)
• Due to inward ‘supply’ from an unregistered person

For details refer:  htdocs-cbec/e-way bill/gst

You can mention URP (Unregisterd Person)

Yes, you should mention URP in case of column number or just enter 0000.