Using script on SAP Adobe Interactive to check values are populated correctly, this is entered in the "Validate" Event

gistfile1.js

var string = this.rawValue;
var pattern	= /[^A-Z]/;

if (!this.isNull)
{
if (pattern.test(string))
{
xfa.host.messageBox("Please enter Initials in UpperCase having no blank spaces. Do not use any special characters, for eg: ^ - \\\ . /", "UpperCase characters."); this.rawValue = null;
}
}