opt in

Choose to join

To opt in is to choose to participate in something, especially a program, service, or agreement that isn't automatic.

The phrase implies active consent rather than passive acceptance: You have to opt in to receive marketing emails.

Opposite of opt out.

Often appears as the adjective opt-in: an opt-in mailing list.

participation

join

Connect or enlist

subscribe · volunteer · participate · engage · commit · enlist · enter · membership · enrollment · registration

consent

agree

Hold the same view

confirm · permission · voluntary · willingness · affirmative · assent · acquiescence · ratify · concur · acknowledgment

choice

select

Carefully pick from options

prefer · embrace · espouse · endorse · support · advocate · proactive · deliberate · intentional · self-select

Categories
Opposites
participation choice

opt inopt out

Decline to participate

decline · refuse · automatic enrollment · withdraw · unsubscribe

Family

option, optional, optimal, optimize, optimization, optionally, opting, suboptimal

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Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G