Ⅰ.
by return (of post)
► COMMUNICATIONS using the next available mail collection to reply: »
We received an invoice by return of post.
»An answer by return would be appreciated.
Main Entry: ↑return
Ⅱ.
by return (of) post
► COMMUNICATIONS if you reply to a letter by return of post, you reply by sending a letter back almost immediately: »
Please send the invoice back by return of post.
Main Entry: ↑post
Financial and business terms. 2012.