The gender consultant we've got working with us at the moment thoughtfully brought me back the below flyer from UNIFEM in Jordan, having read my post on violence against domestic workers. Basically what is says at the top is "when you work you have to get paid."
On the reverse, the right side (which you read first in Arabic) says "you are not a machine," and "in fulfilling your job you have a right to be treated well." The left side is directed at employers and tells them to "address your employees nicely."
It's great to see a campaign on this issue.