Pieces of paper that prove that a transaction occurred are called?

 option5.Source document .........Thank you

source documents========================

5. Source Document 

A source document is the original record containing the details to substantiate a transaction entered in an accounting system. For example, a company's source document for the recording of merchandise purchased is the supplier's invoice supported by the company's purchase order and receiving ticket.

Source Documents is the right answer

Option5 is the right answer.

5. Source Documents or supporting documents

Source documents is the correct answer

Thank you

The correct answer : Source Documents

.>>>>>>>>>>>>>>>>>>5. Source Documents

Pieces of paper that prove a transaction occurred are called source documents. The correct answer is option-5

It is source documents. The documents where transactions is based.