Reproducing the relevant extract from the circular cited by Sri Kasturi Sir for easy reference of the readers.
(i) Where goods are sent by principal to only one job worker: The principal shall prepare in triplicate, the challan in terms of rules 45 and 55 of the CGST Rules, for sending the goods to a job worker. Two copies of the challan may be sent to the job worker along with the goods. The job worker should send one copy of the said challan along with the goods, while returning them to the principal. The FORM GST ITC-04 will serve as the intimation as envisaged under section 143 of the CGST Act, 2017.
(ii) Where goods are sent from one job worker to another job worker: In such cases, the goods may move under the cover of a challan issued either by the principal or the job worker. In the alternative, the challan issued by the principal may be endorsed by the job worker sending the goods to another job worker, indicating therein the quantity and description of goods being sent. The same process may be repeated for subsequent movement of the goods to other job workers.
(iii) Where the goods are returned to the principal by the job worker: The job worker should send one copy of the challan received by him from the principal while returning the goods to the principal after carrying out the job work.