My friend has a short last name, and they still have many websites be like "must be longer then 3 letter"
One of them was to submit a photo of my drivers license. After I did that it OCRed out some details and prepopulated a form with my information. Hitting submit gave me an error saying to use my full middle name, not an initial. My full middle name is a single letter though.
The person on the phone with my bank had no idea what to do and just kept asking me try again.
I busted out my elite hacker skills though and added a space to the end of the middle name field and was able to steal my own identity.
I guess you could follow the Simpsons joke and spell the letter's name. I'm adding this one to my personal list of falsehoods programmers believe about names.