Identify discrepancies before submission where possible, and follow the official correction process if a problem is discovered later. Do not postpone an important explanation merely because the program describes expedited processing. The actual effect on timing depends on the facts and requests; no fixed delay or approval date can be promised.
Resolve what can be resolved without inventing shortcuts
Request missing official records early and track what remains outstanding. Keep a copy of information submitted and any subsequent correction or response. Avoid assuming that changing one portal field updates every other document automatically.
Plan travel from the status and documents actually obtained, not from the date an identity explanation was prepared or uploaded. Delay usually comes from a request nobody sent. A family identifies that a certified copy is needed from a foreign registry, agrees it should be requested, and then waits several weeks for a decision about who will do it — time that would have been spent waiting for the registry anyway.
Send the slow requests first, before the rest of the file is ready, because their turnaround is outside anyone's control. Keep a single sheet listing each outstanding item, the date requested, the channel used and the expected response, and review it weekly. Where an explanation must be given, give it once and completely; a partial answer produces a further request, and the second cycle costs more time than the first answer would have.