...will it show up in the person's notifications?

Because my friend hacked my account and liked my hot Facebook friend's photo without my permission and then I unliked it since I didn't wanna seem like a creep.

No it won't.

Yes it will

If you're on an iPod touch/iPhone, I think it does it doesn't sync fast enough

I'm pretty sure it won't.

If you like something it shows to all your friends if that something you liked is shared as public.

If it's only shared to that person's friends then if you like it it will show up to the friends you have in common.

It will show up if you like it, but it you unlike it, that doesn't pop up if that's what you mean.

Oh if you unliked it then no, it will only show up to those who you guys have in common and that were on facebook in the interval between the liking and unliking

If they're online it will pop up at the bottom, but if they're signed out then no.

If you like it, it'll show up.

Yes

If u unlike it, that people only will notice if that person noticed your like before, if u know what i mean.

It will show up when you liked it on that persons notif but when they click it they'll see you don't like it so they'll assume you unliked it.

Yes. It stays in their notifications, unfortunately.

I've accidentally clicked 'like' while scrolling through the home page, but it's too late to take it back.

Ugh, I think this is true. What bothers me is that the notification of something that you liked won't be removed from the person's account.

If a person unlikes something, the 'like' notification really should be removed. There's a lot of ways on how people can accidentally 'like' something.

THIS!

Thanks for the responses everyone. It really helped.

I know. I was stalking someone's profile and liked something they posted months before.

Ughh, I hate when this happens. Like, it used to happen all the time back in the day when I had a phone that would freeze up while on Facebook, and next thing I know, I had liked all these random statuses.

It does show up though. One time, it happened by accident, and like a couple seconds later, someone texts me with "Thank youu."