# 8. Removal and Expiry ### Removal The registry administrator can remove units from circulation if a major and unfixable problem is identified with them (for example, they were issued by mistake). Reach out to the help desk () if you need to remove units from your account. ### Expiry SAFc will become **expired** once it has passed its [validity period](/user-guide/vi.-saf-certificates/validity-period.md). --- # 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.safcregistry.org/user-guide/v.-account-actions/8.-removal-and-expiry.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.