noun
debt collector; bill collector
A person whose job is to collect debts, often with a slightly negative or rough connotation.
取り立て屋が毎日のように電話をかけてくる。
The debt collector calls almost every day.
あの取り立て屋はとても怖いと評判だ。
That bill collector has a reputation for being very intimidating.
借金取り is a more direct and informal term for a debt collector, while 取り立て屋 can imply a professional or even aggressive collector.
Compound of 取り立て (collection, from 取り立てる 'to collect') + 屋 (suffix for a person or shop).