If a person has left a channel in the past, you need to be in their Telegram contacts to add them back.
They can still join via an invite link as long as they are not on the Removed Users list.
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Se persono forlasis kanalon, nur reciproka kontakto povas realdoni tiun. (Tiu devas havi vian telefonnumeron, kaj vi devas havi ties.)
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Robin,
Apr 25, 2020 at 21:54