Before you decide whether to use passive or active voice, you should consider the purpose of your message and the nature of the situation.

Read the scenario, and then fill in the blanks.

Your company works with freelance writers, and Bob, your colleague, is responsible for processing the freelancers' invoices. Last week, Bob accidentally input $$560$ instead of $$650$ on one of the invoices. The writer hasn't contacted you about the error yet, and you need to e$-$mail her to let her know that there was a mistake and that she should receive the rest of her payment soon.

The following sentence is an excerpt from your e$-$mail: "Bob made an error when he was processing your invoice."

Which voice is used in this sentence?

Active

Passive

Given the purpose of your message, is this voice appropriate?

No

Yes