DYMO 550 LabelWriter Series: Everything You Need To Know
Q1: Do DYMO 550 LabelWriter Series work with the 3rd Party Labels?
NO, the DYMO 550 Series are "locked down" printers. This means that there is proprietary technology, enabled by using RFID chips known as DRM (digital rights management), in the DYMO 550 Series Printers that prevents everything except for DYMO brand authentic labels to work with the software/printer, paper labels are made from FSC certified material.

Q2: Do DYMO 450 Labels work with the 550 Series?
At this time, no, only DYMO Authentic Labels can be used in the DYMO 550 Series Printers.
If you currently order a size, shape, color, adhesive, or custom printed label for your DYMO LabelWriter 450, you will not be able to continue using the same labels with a 550 series printer at this time. Instead, consider the 4XL.

DYMO 550 LabelWriter Features
AUTOMATIC LABEL RECOGNITION: Label printer lets you see the size, type, and number of remaining labels at a glance
ELIMINATE WASTE AND HASSLE OF SHEET LABELS: Print precise label quantities with ease
NEVER BUY INK AGAIN: Direct thermal label printer, no expensive ink or toner required
PRINT FAST: Up to 20% faster than the LabelWriter 450 — prints up to 62 labels per minute
ONLY WORKS WITH AUTHENTIC DYMO LABELS: Uses only high-quality, BPA-free DYMO Authentic LabelWriter labels; paper labels are made from FSC certified material
FREE DYMO CONNECT FOR DESKTOP SOFTWARE: Create and customize 60+ label types through USB connectivity