# Supporting Documents The **Documents** resource allows you to upload, retrieve, update, and delete supporting documents. Use this resource to manage documents required during onboarding and underwriting, such as voided checks, signed applications, and other supporting files. Typical types of supporting document includes: * Voided checks used to verify bank account information * Signed merchant applications * Business verification documents * Multiple documents uploaded together during onboarding * Other onboarding or compliance-related documents Documents can be uploaded as file uploads or Base64-encoded files. --- # 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.xplorpay.com/api-reference/api/merchant-onboarding/onboard-merchant/merchant-demographics/supporting-documents.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.