Sending any project to NAP ( Non Active Project ) is the last option and exercised  after several reminders mail/sms/phone.

1.  As per practice , we try to approach client several times through available communication channel like SMS/Email/Phone and if we do not get response or required material, we send three "Project closing mails".  These mails are sent at least in gap of 2 days to ensure that client gets sufficient time to respond. 

2. Project is also sent to NAP when project is at least 15 days delayed to it's delivery period without activity or response. 

Once project is in NAP mode all tasks related to that projects are removed from system and no designer would able to work on project even you avail all required information after that.  You need to first get that project in Active state for getting started again.