Mine wouldn't... even though I'm mostly quite an organised person...
DH and I were talking about this last night, and commented how, because so much of what we do is conducted online these days, the other probably would have real problems accessing bank account information/ ebay accounts etc.
Do you systematically keep details of all your passwords/ logins for everything?
I sort of do, for some of the more important ones, but it's in a code form which I haven't explained to DH.