Labels Reference
This appendix summarizes all DashLink label requirements, formats, and recommendations from the parcel integration PDF.
Label Types
| Label Type | DPI | Notes |
|---|---|---|
| N/A | 4×6 inches | |
| ZPL | 203 dpi | Standard thermal printer |
| ZPL | 300 dpi | High-resolution thermal printing |
Barcode Requirements
Barcode must encode tracking code, which may be:
external_delivery_id- or
pickup_reference_tag
Supported barcode types:
(Data Matrix, AZTEC, Code 128, Code 39, Code 93, CODABAR, EAN-13, EAN-8, ITF, UPC-A, UPC-E, PDF417)
Tracking Code Rules
- 15–35 characters
- Unique per parcel
- No leading zeros (recommended)
- Optional 3-letter prefix (check with DashLink)
Shipper-generated Label Recommendations
- Only one prominent barcode
- Print ship date
- Include shipper name in top-left
- Avoid clutter
- Ensure barcode quiet zone margins
- Validate barcode scannability at scale
DashLink-generated Label Notes
- Returned in base64-encoded string
- Always reflect account-wide printer configuration
- Do not modify ZPL payload
Sample Label (From PDF)
Page 39 of the PDF shows a full rendered DashLink label with:
- Sender/recipient information
- Routing blocks
- Barcode
- Tracking code