If the transfer settles the same day it's no issue, i did 400k checked it then another 400k within a couple minutes. The 400k was in case it didn't settle the remaining 400k was within the limit at the time. You'll need passbook or statements for both accounts
I made one small claim and it was paid, and one equalled the excess so no point claiming. Expect the insurer to check the details like were you in homeland 6 months before trip, driving licence, not over alcohol limit etc etc