You have to present some required documents for obtaining a visa on arrival. Beyond these border control may require additional documents that prove your eligibility to enter Comoros.
All nationals from all the countries are eligible to Comoros Visa on Arrival.
Yes, you can obtain a visa on arrival to Comoros at both airport and land borders.
Comoros visas can be:
Your passport must be at least six months valid beyond your arrival date to Comoros.