A person or thing that observes, often in a role to monitor or record information.

A participant who watches an event without an official role.

अवलोकक

English Usage: The unofficial observer reported the findings at the end of the event.

Hindi Usage: अनौपचारिक अवलोकक ने कार्यक्रम के अंत में निष्कर्ष बताये।

Someone who monitors an election or process without formal credentials.

चुनाव पर्यवेक्षक

English Usage: The unofficial observer was denied access due to lack of accreditation.

Hindi Usage: अनौपचारिक चुनाव पर्यवेक्षक को मान्यता की कमी के कारण पहुँच से वंचित कर दिया गया।