If you have ever ordered an item on Amazon Europe, Zalando, or an international marketplace and initiated a return, you have likely encountered the infamous "Dual Label" sheet: two distinct shipping labels positioned side-by-side on the upper half of a single A4 page. Here is how to cleanly split and print both at 100% scale on your thermal printer.

1. What is a Dual-Label A4 Sheet?

In cross-border European logistics, parcels traveling between countries often need two independent transit barcodes:

  • Left Label: National domestic leg (e.g. Colissimo France eRS drop-off label).
  • Right Label: Destination country receiving leg (e.g. DHL Germany Retoure Paket).

Carriers bundle both 100×150 mm portrait labels side-by-side on the top half of an A4 landscape or portrait sheet, with cut instructions or customer return receipts on the bottom half.

2. The Thermal Printing Nightmare

When you attempt to print this document on a 4×6 inch thermal roll using standard software:

  1. The software rotates the entire upper half to landscape to fit both labels together.
  2. Both labels are compressed to roughly 50% of their intended size to fit on one 4×6" sticker.
  3. The postal barcodes shrink so dramatically that postal scanners cannot read them, forcing postal clerks to manually type 24-digit tracking codes or reject the package.

3. How Label Lasso Pro Automatically Splits Dual Labels

Label Lasso Pro includes a specialized Dual-Label Detector & Splitter designed specifically for this scenario.

The Dual-Label Splitting Engine:
  1. Carrier Keyword Analysis: Scans the PDF text layer for simultaneous indicators like "Colissimo" and "DHL Paket" or dual barcode streams.
  2. Midline Vertical Partitioning: Automatically identifies the vertical dividing seam between both labels.
  3. Independent Full-Scale Processing: Slices Label 1 (Colissimo) and Label 2 (DHL) into two separate high-resolution 100×150 mm pages.
  4. Sequential 1-Click Print: Sends both labels to your thermal printer in sequential order at 100% full scale — zero manual slicing or scissors needed!

4. Other Supported Carrier Edge Cases

In addition to Colissimo + DHL dual sheets, Label Lasso Pro automatically handles:

  • Leboncoin / Chronopost Shop2Shop: Landscape A4 sheets with Fiche Destinataire on the left and the shipping label on the right.
  • Mondial Relay / InPost: Lockers sheets with cut lines and drop-off vouchers.
  • Amazon Return Slips: Multi-page documents with internal return authorization slips and exterior shipping barcodes.
Print Dual Labels with Label Lasso Pro