Commercial Messages: These types of SMS are those related to promotional or commercial content. According to the TRC Regulations, commercial messages should not be sent out before 9:00 am and/or after 6:00 pm from Saturday – Thursday. The Sender ID of commercial messages should start with the letters “adv” before your company’s name. Service Messages: Are informative messages that cover all communications between your company/organization and your customers or members base. Service messages should not have any commercial content and can be sent out 24 hours a day, 7 days a week. The Sender ID of service messages can be without the letters “adv”. Financial & Transactional Messages These types of messages are sent when a transaction occurs. They can be sent out 24 hours a day, 7 days a week. The Sender ID of service messages can be without the letters