Print a booking from Hostelworld Inbox

Hostelworld allows you to access the booking information for each booking, and from there you can print out an invoice.  

From the Bookings tab page, click on Advanced Search - Arrival Date/Booked Date, select the dates and click Search

A list with all your booking on the selected dates will show:

After you select and open a booking - Click the print icon at the top right, and print the booking