# Idempotent Messages Azure Storage Queue - Where at all possible try to minimize side effects of processing queue items and being able to handle the same message sent multiple times. For messages related to processing such as financial transactions, leverage high throughput/low cost data store such as Azure Table Storage to check if the message has already been processed by storing a history of processed transactions, note that this adds significant complexity. --- # 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://ecfmg.gitbook.io/azure-serverless-quickstart/patterns-and-practices/itempotent-messages.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.