A User ID is the unique nickname you use to identify yourself on eBay.
When you register at eBay, choose a User ID that you like and that you'll remember. For example:
You might use words identifying your favorite collecting area, your business, or occupation.
You could refer to your hometown and call yourself camberwell_beauty.
Or refer to your own sense of style and choose something like Del_Boy303.
Remember that User IDs:
May contain letters (a-z), numbers (0-9), and/or many symbols
Must be at least two characters long
Can't be obscene, profane, or hateful
Can?t be or resemble an email address or website
Things you can't include:
URLs (for example xyz.com)
Consecutive underscores "__"
An underscore "_", dash "-", or period "." at the beginning of a User ID
The word "eBay"—only eBay employees may use "eBay" in their User IDs
The letter "e" followed by numbers
Tip: If you forget your User ID, you can have it sent to your registered email address.
Note: You can only change your User ID once in a 30-day period. This is to prevent confusion for the rest of us. Keep in mind that your User ID is a valuable asset, like your feedback rating. Trading partners will come to recognize you by your User ID, so it's a good idea to choose one you'll want to use for the long term.