Currently, guest-to-guest relationship types (such as parent/child or other underage-related relationships) are available in the Mews UI, but they cannot be created or updated through the Connector API.

For integrations operating in countries where local regulations require declaring relationships between adults and underage guests, this limitation prevents full legal compliance through automated check-in flows.

We would like to request support for creating and managing guest relationship types via the Connector API, including underage-related relationships already supported in the UI.

This enhancement would help partners maintain regulatory compliance while keeping the guest registration process fully automated.