Preserve relevant acquisition, ownership, sale and transfer records and provide the material requested through the official process. Explain the actual path to the bank payment. Decide what the documentation must be able to show, and work backwards from there. Three things usually need proving: that the applicant lawfully acquired the holding, that the applicant owned it at each point on the way, and that the money reaching the bank account is the proceeds of that holding and not of something else. Sort the records you already have against those three headings before requesting anything new.
Do not let the final deposit erase the source question
An exchange statement or bank balance does not automatically establish the complete lawful history. Identify any gap honestly rather than inventing a purchase record or describing unsettled proceeds as already available. Timing of the export matters more than most people expect.
Platform histories are commonly available only for a limited window or only to an active account, so a closed account can leave the applicant unable to produce the very record that answers the acquisition question. Download the full history now, in the platform’s own format, and keep the raw file rather than a screenshot. Where a gap already exists, say so plainly and describe what is missing; a candid account of an incomplete record is easier to work with than a tidy narrative that cannot be supported.