What is a piece of paper that contains details such as date, account number, and amount of funds deposited called?

A piece of paper that contains details such as the date, account number, and amount of funds deposited is known as a deposit slip. This document is specifically used when depositing money into a bank account, allowing the bank to accurately record the transaction. The deposit slip typically includes important information to ensure the correct account is credited and helps prevent errors during the deposit process.

In contrast, a withdrawal slip is used for taking money out of an account, while a bank statement is a summary of all transactions in an account over a specific period, which includes deposits, withdrawals, and other activities, rather than just individual deposits. A transaction record is a general term that could refer to any documentation of a financial transaction, but it lacks the specific focus on deposits that a deposit slip has. Thus, the deposit slip is the most suitable answer among the options provided.