Mature

Brought by natural process to completeness of growth and development; fitted by growth and development for any function, action, or state, appropriate to its kind; full-grown; ripe.

Completely worked out; fully digested or prepared; ready for action; made ready for destined application or use; perfected; as, a mature plan.

Of or pertaining to a condition of full development; as, a man of mature years.

Come to, or in a state of, completed suppuration.

To bring or hasten to maturity; to promote ripeness in; to ripen; to complete; as, to mature one's plans.

To advance toward maturity; to become ripe; as, wine matures by age; the judgment matures by age and experience.

Hence, to become due, as a note.