I did. Chances are you did too.
Admittedly, sometimes I simply forgot or never got around to getting those promised doubles printed. After all there wasn't text messaging to gently remind me and it took a whole three days to get them printed at Walgreens and finding the negatives was ALWAYS a pain staking task.
I bet that person you promised still remembers they asked for those photos {I remember a few instances when I asked} so what's the solution? Get them scanned and send them the digital images via email or tag them on facebook. What a great way to surprise your friends and family with memories from the past.
With all your photos scanned and digitized you will always be armed and ready for "Throwback Thursdays". Just make sure you start with photos highlighting your MC Hammer pants or sky high bangs.