しゅうきん集金shuukin
1.

The act of gathering money for specific purposes, such as membership fees or service charges, along with the funds that are collected.

2.

A process or operation where payments or contributions are aggregated, often conducted by an individual or organization tasked with this responsibility.

しゅうきんにん集金人shuukinnin
1.

A person whose job is to collect payments or debts from individuals or businesses.

2.

An individual responsible for gathering outstanding dues, often working on behalf of a company or service provider.

3.

Someone who approaches customers to retrieve payments that are overdue, typically in a formal or systematic manner.