The appointment of a new quality assurance manger is expected early next month. ( Passive)
I expect to hear about the appointment of a new quality assurance manager early next month. ( active)
The recommendation to implement a fraud management program came from J. D. Reese. ( passive)
J. D. Reese made the recommendation to implement a fraud management program. ( Active)
Elizabeth polled only the clients in the Southeast, thereby producing an inaccurate marketing report. ( Active)The inaccurate marketing report was caused by Elizabeth’s polling only the clients in the Southeast. (Passive.)
Active voice has the person doing something before the predicate (action).
Passive voice uses a form of the verb “be” and a participle. The person doing something is located after the action. ( was used , is made , will be written)

The appointment of a new quality assurance manger is expected early next month. PASSIVE, Present Simple tense
I / We (unknown subject) expect the appointment of a new quality assurance manager next month. ACTIVE, Present Simple tense
The recommendation to implement a fraud management program came from J. D. Reese. ACTIVE, Infinitive
The recommendation for a fraud programme to be implemented came from JD Reese. PASSIVE, Infinitive
Elizabeth polled only the clients in the Southeast, thereby producing an inaccurate marketing report. ACTIVE, Past simple tense
Only the clients in the Southeast were polled by Elizabeth, thereby producing an inaccurate marketing report. PASSIVE, Past simple tense
The passive is formed by using a form of the verb ‘BE’ + the past participle of the verb.