Shipping Labels and Shipping Postage

Shipping labels and postage are the final critical step between the packing station and delivery. An incorrect label leads to delays, additional charges, or returns – whereas a correctly franked parcel moves smoothly through the logistics chain. For online retailers, Warehouse Fulfillment centers, and 3PL partners, professional handling of labels and postage is therefore not a side issue, but a central lever for cost control, delivery speed, and customer satisfaction.

What Are Shipping Labels and Postage?

A Shipping Sticker contains all information necessary for transport: recipient address, sender, tracking number, barcode, carrier logo, and often additional services such as cash on delivery or parcel locker delivery. Postage refers to payment of the shipping fee – either through a visible stamp on the parcel, a digital postage mark on the label, or contractual billing with the carrier.

In modern fulfillment processes, both elements merge: the label is created digitally, already includes the paid rate, and is printed directly at the packing station. This eliminates manual franking machines in many operations – however, the quality of label creation becomes the decisive factor.

Distinction from Other Labels

Not every label on a parcel is a shipping label. In the warehouse, the following are distinguished:

1. Shipping label – carrier-compliant, with tracking and postage
2. Contents label – SKU, order number, packing instructions for internal processes
3. Return label – separate process for returns
4. Hazardous goods or customs labels – additional documents for special cases

Overview of Postage Methods

The choice of postage method depends on shipment volume, carrier contract, and technical infrastructure. The most common procedures in German e-commerce:

Digital Postage via Shipping Software

With digital postage, shipping software or a Warehouse System creates the label including rate calculation. The amount is billed via a carrier customer account or an API interface. Advantages: high speed, automatic rate selection, direct tracking number, and seamless integration with shop systems.

Franking Machines and Postage Stamps

Smaller retailers with low volume sometimes still use franking machines from Deutsche Post or pre-printed postage stamps. This method is less suitable for scaling fulfillment, as labels and postage are created separately and error rates increase.

Contractual Consolidated Billing

Large shippers and 3PL service providers frank implicitly: labels are created, and billing occurs periodically based on shipment statistics. Prerequisites include a framework contract with the carrier and a reliable interface for shipment reporting.

The Label Creation Process in Fulfillment

A professional label workflow follows a clear sequence – regardless of whether packing takes place in-house or at a fulfillment service provider.

Step 1: Validate order data

Before a label is created, recipient address, weight, and dimensions must be correct. Address errors are one of the most common causes of failed deliveries. Automatic address validation in the shop or WMS significantly reduces returns.

Step 2: Select rate and carrier

Rate selection directly affects shipping costs and delivery time. Rule-based logic selects the appropriate carrier and product based on weight, destination zone, and customer preference – for example DHL Paket, Kleinpaket, or Hermes Päckchen.

Step 3: Print and apply label

The label is produced on thermal direct paper or via laser printer and applied flat to the largest even surface of the parcel. Barcodes must not be creased, covered by tape, or damaged – otherwise automated sorting at the carrier hub will fail.

Step 4: Register shipment and activate tracking

After printing, the software registers the shipment with the carrier. Only then is the tracking number active and customer notifications can be triggered. Delayed registration leads to "tracking not found" complaints.

Mandatory Information on a Shipping Label

A complete shipping label contains at least the following elements:

• Recipient name and full address
• Sender address or return address
• Tracking number as barcode and plain text
• Carrier identification and product designation
• Weight or postage value (depending on carrier)
• Routing codes for automated sorting

Choosing Rates Correctly and Controlling Costs

Postage does not only mean "paying postage," but selecting the optimal rate product for each shipment. A common mistake: every parcel is shipped with the standard rate, even though a small parcel or Warenpost would suffice.

Exact limits vary depending on carrier and contract conditions. Close alignment of packaging sizes and rate tiers measurably reduces shipping costs – for details, see the calculation of shipping costs.

Software and Technical Integration

Without suitable software, efficient label creation is hardly possible with growing order volume. Typical systems in the fulfillment stack:

1. WMS (Warehouse Management System) – controls pick, pack, and label printing from a single interface
2. Multi-carrier shipping software – aggregates DHL, DPD, GLS, Hermes, and other providers
3. Shop system plugins – simple solution for beginners with one carrier
4. ERP interfaces – transfer invoice and shipment data to accounting

Carrier selection and its technical integration determine which postage options are available to you. A multi-carrier strategy allows you to choose the cheapest or fastest carrier per shipment – provided all carriers are connected via a unified label interface.

Common Errors with Shipping Labels and Postage

Even experienced shippers make recurring mistakes that cause costs and frustration:

1. Incorrect weight entry – leads to additional charges from the carrier
2. Illegible or creased barcodes – shipment gets stuck in sorting
3. Duplicate label creation – double costs for non-cancelled labels
4. Wrong rate class – excessive costs or rejected shipments
5. Delayed shipment registration – customer sees no tracking
6. Outdated carrier contract data – prices do not match billing

Checklist: Label Quality Before Carrier Handover

Before handover to the carrier, every shipment – manually or by random sample – should meet the following criteria:

• Recipient address complete and correctly formatted
• Weight captured and matched to rate
• Label applied flat, no creases over the barcode
• Barcode fully visible and scannable
• Return address present (if required by carrier)
• Tracking number created in system and tracking active
• Special labels (hazardous goods, "This side up," fragile) applied as needed
• No duplicate or outdated label on the parcel

Bulk Shipments and Scaling

From several hundred shipments per day, a single USB label printer is often no longer sufficient. Bulk shipments require:

• Batch label printing – all labels for a carrier pickup in one run
• Sorting lists – assignment of label to package before printing
• Manifest handover – digital shipment list to the carrier at pickup
• Cancellation workflows – cancel unshipped labels before end of day

International Postage

For international shipments, customs documents, HS codes, and international carrier products are added. A domestic label is not sufficient – postage must account for the destination country, goods value, and, if applicable, IOSS numbers. Differences between EU shipping and third-country shipments are significant; shipping zones should be stored in the rate logic.

Connection to Packaging and Materials

A shipping label is only as good as the surface it adheres to. Smooth cartons, correct label size (typically 105 × 148 mm or 102 × 150 mm), and high-quality thermal labels prevent peeling during transport. Information on materials and application can be found under Labels and inserts.

KPIs for Label and Postage Processes

Successful fulfillment teams measure their label processes:

Best Practices for E-Commerce and 3PL

The following practices have proven effective in fulfillment operations:

1. Uniform label formats per carrier – no mixing of A4 and thermal without reason
2. Automatic rate optimization by weight, zone, and delivery time promise
3. Daily reconciliation between printed labels and actually shipped parcels
4. Training at the packing station – new employees only ship after label test
5. Regular rate updates – carriers change prices annually, sometimes more frequently
6. Backup printer – label printer failure stops all shipping

For an overview of available shipping products and their use cases, see the article on Shipping methods overview. Definitions can be found in the glossary under Shipping labels and postage (Glossary).

Frequently asked questions

Can I cancel a label retroactively?
Yes, via carrier portal or API before handover to the carrier.

Thermal or laser printer?
Thermal for volume, laser for occasional use.

Who pays for incorrect postage?
Usually the shipper; additional charges follow.

Must every parcel be weighed?
Recommended from the first parcel, mandatory under contractual requirements.

How long are labels valid?
Carrier-dependent, often 7–30 days until handover.

Conclusion

Shipping labels and postage form the interface between warehouse and logistics network. Those who combine digital postage, correct rate selection, and strict quality control reduce shipping costs, avoid additional charges, and deliver a professional customer experience with reliable tracking. The investment in shipping software, calibrated scales, and trained staff pays off even at moderate shipment volumes – and becomes more important with every additional parcel.

Related topics

• Shipping methods overview
• Calculate shipping costs
• Carrier selection
• Shipping zones domestic and international
• Labels and inserts

Last updated: July 6, 2026