What methods can I use to aid users to remember a serial number? While you might expect people to write them down, many just try and remember them, then get it wrong, and need to retrieve the number again, reflecting badly on the overall experience of the system.
Environment. Users install software on their machine, which generates a unique serial number, eg SHD5E. We need them to remember this number for later entry into a website. Users typically wish to be anonymous, and we might not be connected to the internet.
Edit: they are entering the serial number on a completely different machine, such as generating serial numbers on factory floor and then entering them on office monitoring system later. The serial number is the key to allow office system to retrieve information generated by first machines.
If we make the serial numbers longer to encourage writing down, users make mistakes and get frustrated. We tried using a QR code with serial number, but not all users could use them.
We also thought about somehow converting the serial number to a rememberable phrase, such as "yellow dog 12", but this needs a few hundred useable words in or to keep it short, (spelling alphabet? Not just phonetic alphabet) and I dont trust myself to create a good list of words for this purpose.