An e-Way Bill’s Part A Slip is a temporary number generated after entering all the details in Part A of the e-Way Bill. You can share this with your transporter for further use. Later on, you or the transporter need to generate Part B for the e-Way Bill. Part A slip is useful when you have already prepared an Invoice for the transaction but do not have the transporter details. In such a case, you can enter the details regarding Part A of the e-Way Bill and keep it ready for entering details regarding transportation for Part B.