Well I did that with my passport, so I suppose yours is far less important.
I've done that too. Turns out it was where I thought is was, only in a folder to keep it 'extra safe'(and impossible to find).
lol , sounds like my missus with her "ive put it in a safe place"......no one knows including her, where this safe place is!
I know that feeling, I'm not convinced it was me that saw it last.