# Checkpoint Publish a copy of the message to the selected rule engine queue. The original message is marked as successfully processed once the target queue acknowledge publish of the copied message. Useful if you want to mark message as high priority or process messages sequentially grouped by originator of the message. See default queues or define your own queue. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.tesenso.com/tesenso-iot-cloud/rule-engine/rule-engine/flow/checkpoint.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.