How were Harappan seals and sealings used to facilitate long distance communication ? What did the sealings convey?

How were Harappan seals and sealings used to facilitate long distance

1.	How were Harappan seals and sealings used to facilitate long distance communication ? What did the sealings convey?
Answer» Solution :: A seal convey the IDENTITY of the sender and also GUARANTEES SAFETY and security of the goods SENT inside the BAG