Preventing Duplicate CRM Leads from Repeated Telegram Webhook Deliveries

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Telegram may deliver the same webhook event more than once, which can cause an integration to create a second CRM lead for one enquiry. The article recommends a stable event identifier, such as update_id combined with source and tenant details, plus a processing record stored durably before acknowledging the request. Checking whether an ID has been seen is insufficient, because a lost CRM response leaves the handler unable to tell if a retry is safe. It therefore proposes persisting an operation identifier that stays constant across worker retries, along with atomic job claiming and unique database constraints. The guide is aimed at developers wiring Telegram Bot API to their own handler and a CRM, and it separates repeated deliveries from genuinely new enquiries that may belong to a separate deal.

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