Since inter- means "between, among", an intermediary is someone who moves back and forth in the middle area between two sides—a "go-between". Mediator (which shares the medi- root) is often a synonym, and so is facilitator; broker and agent are often others.

What is an example of an intermediary?

For example, merchants are intermediaries that buy and resell products. There are four generally recognized broad groups of intermediaries: agents, wholesalers, distributors, and retailers.

What does care of intermediary mean?

This phrase indicates that something is to be delivered to an addressee where they don't normally receive correspondence. In practice, it lets the post office know the recipient is not the normal recipient at that street address.