No. Comoros doesn't ask visitors to fill in an online arrival form (also called an entry form, immigration card or landing card) before they travel. Visa required; available on arrival for EUR 30. No online arrival form found.
Do I still need a visa for Comoros?
An arrival form is not a visa. Whether you need a visa or an electronic travel authorization depends on your nationality, so check Comoros's official immigration website or your own government's travel advice.
Other countries in East, Central and Southern Africa