# Participants Key participants in an e-signing process: * **Signer(s):** Review and sign documents. * **Document Sender / Initiator:** Prepares and sends documents, defines order, sets deadlines, configures authentication. * **Certifying Authority (CA):** Issues DSCs for secure digital/qualified signatures. * **Electronic Signature Platform / Service Provider:** Enables uploading, managing roles, applying/verifying signatures, ensuring encryption and compliance. * **Regulatory Bodies:** Define the legal framework (e.g., IT Act – India, eIDAS – EU, ESIGN – USA). **Example:** An HR Manager sends an offer letter (Sender) to a candidate (Signer) via emSigner (Service Provider), validated by eMudhra (CA), complying with the IT Act (Regulatory Body). --- # 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://support.emsigner.com/key-concepts/participants.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.