you can't be too careful

you can't be too careful

One must exercise the utmost caution and prudence (in the face of a very dangerous, risky, or problematic thing or situation). I'm sure everything is in order, but I'd like to have my lawyer read over the contract one more time—you can't be too careful. I think you should wear one of those holsters that keeps your passport and some extra cash hidden under your clothes. You can't be too careful when you're traveling abroad alone, you know.
See also: careful

you can’t be too ˈcareful

used to warn somebody that they should be careful to avoid danger or problems: Don’t stay out in the sun for too long — you can’t be too careful.
See also: careful
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It may just be coincidence that the Shadow job became so volatile after the legendarily feisty Swansea West AM took over the ministerial brief, but you can't be too careful.
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