> For the complete documentation index, see [llms.txt](https://help.reletter.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.reletter.com/frequently-asked-questions.md). # FAQ ### How does the 7-day free trial work? Every plan starts with a 7-day free trial. You will be asked to enter your credit card information to start the trial, but your card will not be charged until the end of the 7 days. You can cancel your trial at any time and your card will not be charged. We'll send you a reminder email three days before your trial ends. ### How does the search allowance work? Each time you search for a topic, title or author in Reletter, we count that as a search. Although if you search for the same keyword multiple times during a single session it will only be counted once. If your chosen plan comes with a maximum number of searches per month and you use them all, then you will no longer be able to use the search feature. However, your lists and other features will continue to work. *The monthly quota resets on the day of the month that you were first billed, i.e. your billing period.* ### What is your cancelation policy? You can cancel your free trial or subscription at any time from the [billing page](https://reletter.com/account/billing). Your subscription will remain active until the end of your billing period and your card will not be charged again. There is no penalty or notice period. ### What is your refund policy? Please refer to the [Refund policy](/refund-policy.md) page. ### Is there a fixed contract? No, you can cancel your subscription at any time. ### Can I switch plans later? Yes, you can [switch your plan](https://reletter.com/switch-plan) at any time (even during the free trial). Your current month's subscription will be prorated against your next month's bill. ### How do I upgrade, downgrade or cancel my subscription? Please refer to [How to upgrade, downgrade or cancel your subscription](/how-to-upgrade-downgrade-or-cancel-your-plan.md) ### **How do you determine that a newsletter accepts sponsors or advertisers?** We look for certain keywords and patterns in a newsletter's recent issues to automatically detect whether that newsletter accepts sponsors or not. For example you can imagine if every issue of a newsletter includes the words "sponsored by" then it's a good match. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## 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, and the optional `goal` query parameter: ``` GET https://help.reletter.com/frequently-asked-questions.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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.