1. Formal and authorized routes of communication or procedures established by an organization, institution, or government
You must submit your complaint through official channels.
Você deve apresentar sua reclamação através dos canais oficiais.
2. Legitimate pathways for conducting business, making requests, or obtaining information from an entity
The announcement was made through official channels to ensure accuracy.
O anúncio foi feito através de canais oficiais para garantir precisão.