Many times, the receiver of goods is not known at the time they are shipped from the shipper's premises. One common example -FMCG firms send trucks out to supply kirana shops in a specific area. What should be done?

In these cases, movement can be caused by self. There is no supply. Delivery challan can be used to generate e-way bills in such instances. You should follow all the delivery challan provisions, as well as the rules for eway bills.