Vrbo does not require a pet fee for service animals. According to their policy, service animals are exempt from any additional charges or restrictions related to pets.
Vrbo's policy is aligned with the legal requirements of countries that have service animal laws. They ensure that all hosts with properties in such countries accommodate guests who require a service animal. This policy takes precedence over any normal house rules or pet policies since service animals are not considered pets. This allows guests with disabilities who rely on service animals to fully access and enjoy Vrbo accommodations.
You can find more information in Vrbo's service animal policy.