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I've been thinking I should probably just memorising my card number. Would take a bit of effort but can't be much harder than memorising a phone number, and possibly faster than entering my master password to unlock my password manager

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I've memorized my last 2 credit card numbers. Takes about 5-10 minutes and is absolutely worth it!

I’ve done it a number of times without even trying. Problem is if you have to replace it a lot.

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