His monetary problems are compounded by an aggressive bill collector looking for payments and competition from a rival scientist.

Later, when he was tired of being a bill collector, he and his superiors decided to audit the text messages to see if the character limit was too low.

She illustrates the process by which bill collectors are trained to restrict compassion or liking for debtors.

The good mood doesn't last long, however, as bill collectors and creditors come knocking at the door.

He takes cases based on their merit rather than on their monetary value, which often leads to terse notices from bill collectors.