Some parents do not use Telegram — what happens to their messages?

Telegram only becomes usable once the recipient has linked the Klasku bot through a one-time linking link. Before that, the message drops to the next rung: the unofficial WhatsApp route, if the school has it switched on.

If no channel can be used at all, the message is marked failed with its reason in the school's message history, so admins know who was not reached. For something urgent, an invoice can be forwarded by an admin over their own WhatsApp from the invoice detail screen.

The prompt to link Telegram appears by itself in the Parents Portal and the Teachers Portal, and admins can copy a recipient's linking link to send it by hand.