NETC@RDS enables the Health Practitioners to check foreign patients' entitlement to health care. It is based on an agreement, so-called the General Agreement, between Health Insurance Organisations (HIO) aiming to provide easier access to cross-border healthcare for citizens travelling abroad but inside the EEE/EU and Switzerland. The service can be provided via an eye-readable EHIC, a national health insurance electronic card, or via certain national e-ID chip cards issued by the responsible government authorities of the participating partners.