Plot Twist: You get arrested for using counterfeit money, the date on the money is probably invalid in 1980.
Now I’m genuinely curious if a bank would catch it if you tried using cash from the future. If there wasn’t a redesign, do they check serials and stuff if every other security measure is present?
Yeah, for US money the serial number is prefixed with a letter to donate the year it’s from and the note also has a series year for the actual design printed on it.
Money has evolved a lot since the 1980s so modern money would be obvious. And banks in the 80s would probably be pretty hot on money fraud as hard case was so central to the economy.
A better option would be to collect money printed prior to the year you wanted to time travel to. It’s unlikely they would be able to detect duplicates of real money already in circulation elsewhere in that time. But it might be hard to fine money that old in large volumes as so much gets taken out of circulation and replaced with new money every year.
