How to placing an order?
https://buyers.fiverr.com/en/article/placing-an-order
How to request for modification?
http://support.fiverr.com/hc/en-us/articles/201505026-Request-Revisions
How to remove Fiverr watermark?
As soon as complete the orders Fiverr watermark will automatically remove by itself.
When should I get printable file?
As soon as you accept my delivered mockup I'll send you printable files.
How to accepting deliveries?
http://support.fiverr.com/hc/en-us/articles/206096907-Accepting-Deliveries