Retain the filed case, investment and transfer records, immigration notices and status documents, plus relevant project reports and supporting evidence obtained through the appropriate process. The precise records depend on the structure and case. Keep a clear version history rather than relying on access to a sponsor’s website years later.
Organize the record around events and evidence sources
Use a dated index linking each project milestone to the relevant update and each immigration event to its official notice or admission record. Identify missing items early and clarify who will provide them. Preserve the original lawful-source file even if a later request focuses on another issue.
Do not assume the project administrator holds every personal record needed by the household. The record that vanishes first is the one held on someone else's server. Sponsor portals are reorganized, links expire, and an administrator who answered emails in year one has moved on by year three.
Download rather than bookmark: save each update as a file, with the date it was issued in the filename, in storage the household controls and can still open after a change of laptop. The second common loss is a paper notice photographed once and never filed. Keep originals and images of every immigration notice and entry record in the same index as the project documents, so the two timelines can be read side by side.