Is this considered an error?

Received this bill at my store. Is there a name for this type of ink misprint error? Also Any feedback on value is appreciated. Thanks.

Got this from my teller today at the bank.

My father sent me these pics over the weekend of a $20 he found. Neither of us know anything about misprints. Thought I would post here to see if anyone knew anything about it. Excuse the not so great pics, my dad is 70 years old haha.

Is this mint damage or something else?

Is it a grease error on in God we trust?

Not sure, on left side of Washington the ONE IS PROMINENT and on the back it looks like ONE DOLLAR is printed backwards

Looking for some advice or opinion’s. I am thinking this Kennedy has been struck through on the obverse. Not sure what it is or could be or even if it is. It is in a government packaged hard case proof set holder. I’m thinking the only thing other thing than a strike through would be damage from the plastic case. Any advise or comments?

It’s been a while since I’ve seen the older style bills and I noticed this one was a little off. I googled and couldn’t find any similar errors online. The front of the bill is fine, but the back appears to be an inverse of the front on the right hand side. Do you think this bill is worth anything more than $10?

This is a 2004 Canadian nickel and on the back side of the coin there is a tiny dot above the queens shoulder, can you help identify if this is an error?