Field response lengths?

I have fields that require first name and last name.  I would like to make it so that they must at least enter 3 characters in the last name field to keep from just entering an initial.  If that makes sense?  

Unfortunately, it is not possible to limit the character length of the full name field in the form builder.

The easiest workaround would be to use a Long Text Entry (text area) field. This has a minimum limit option.

Another workaround would be to download your form source code and implement a limit through a custom script.

If you need further assistance, let us know.