If you can remember the word "chocolate" but not the spelling then you can guess it. You might write choklit or choclate or something but you can at least get close.
If you forget what 警察 (police officer, jing3cha2) looks like then you're just completely screwed. Maybe you can remember a radical or two but it's still just going to be wrong and not meaningfully recognisable.
I guess you could write down 景茶 (jing3cha2) and rely on the phonetics, or use a different word if you know one, but it's still wrong on a level that "choclit" just isn't.