1. in the proper or expected manner; appropriately
2. at the expected or proper time; punctually

Examples

• The contract was duly signed by both parties.
• She was duly elected as class president.
• The application was duly submitted before the deadline.
• He duly arrived at the meeting on time.
• The certificate was duly issued by the authorities.
• The warning was duly noted by all employees.
• Payment was duly received and processed.