Can I remove the copyright information from the footer?

Yes you are free to remove the copyright informations on all Template Plazza template footer. But, you must retain the following copyright information in the template templateDetails.xml file:

<author>TemplatePlazza</author>
<copyright>Copyright 2015 - TemplatePlazza.com</copyright>
<authorEmail> This email address is being protected from spambots. You need JavaScript enabled to view it.</authorEmail>
<authorUrl>www.templateplazza.com</authorUrl>

Also, the claim on creation of the template such as "Design By Your Company" and such similar things are not allowed. Please use word "Powered by" instead of "Designed by" while note your company name in the footer