An Instagram video showed Hilary Duff's 3-year-old, Banks, away from her car seat.
In the clip posted by Molly Bernard, the mother and daughter were on a car ride.
Fans commented that California laws prevent under 8-year-olds from riding without a car seat or booster.
Enraged critics posited that Banks could have died in an accident without the car seat.
Last Fall, Duff posted a touching Instagram tribute to her husband of over 3 years, Matthew Koma.
The "Lizzy McGuire" actress credited Koma for taking care of the kids and chores despite working full-time.
Duff also praised her spouse for supporting her new show.
The "This Heart" singer stars on the "How I Met Your Mother" spin-off.
"How I Met Your Father" stars Kim Cattrall, Suraj Sharma, Tom Ainsely, and more.
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