James White's "Pushover Planet" (novelette, alien invasion, free): Surrender your stuff. And life. Or else...
Much of the story is of these funny negotiations. Of course, humanity will win, because it has an ace up its sleeve.
I occasionally found the story a bit draggy.
Fact sheet.First published: Nebula Science Fiction, #14 (November 1955).
Download full text as part of the scans of the magazine it originally appeared in.
Related: Stories of James White.