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In that case, you will not receive a ‘seen’ notification. When users enable message previews in their notifications, they can read part of the message without opening the Viber app. If the recipient received your message, but you didn’t get a ‘seen’ message, they may have read it without opening the app. Otherwise, you will not read receipts when you chat with that person. There is nothing you can do if your friend turns the ‘seen’ status off, except politely ask them to turn it back on.

What if you started receiving notifications seen in some conversations but not in others? In that case, some of your contacts have probably disabled this option. With your seen status turned on, you should receive ‘seen’ notifications at the bottom of the conversation.
