Using USPS with SHOPLINE Shipping

SHOPLINE has partnered with USPS, the official mail and package delivery service of the United States, to simplify the order fulfillment process for SHOPLINE merchants. If you’re shipping from within the United States, you can activate SHOPLINE Shipping to access USPS services directly from your SHOPLINE admin panel and easily ship your packages domestically.

With USPS integrated into SHOPLINE Shipping, you can easily manage your domestic shipments with reliable delivery options and convenient support. Follow the guidelines below to ensure smooth and efficient shipping for your business.

USPS Domestic Shipping Services

You can ship domestically within the United States using the following USPS services:

USPS Domestic Shipping Guidelines

A. Package Requirements

Ensure your parcel meets these USPS requirements:

• Weight limit: 70 lb (31.75 kg)
• Size limit: Length + 2 × (Width + Height) ≤ 108 inches (274 cm)

For more details, view the full USPS requirements. 

B. Packaging Guidelines

Prepare your package according to USPS standards:

• Use strong packaging with enough space for cushioning to protect fragile items and prevent shifting.
• Secure all seams with 2-inch-wide packing tape. (Do not wrap boxes with string, cord, or twine, as these can get caught in USPS sorting equipment.)
• When reusing boxes, remove or cover any old logos, barcodes, shipping labels, or addresses.

Watch USPS's HOW TO PACK A BOX video to learn how to pack correctly. 

C. Measuring Tips

Refer to USPS's Tips and Tools for Measuring Packages guide to measure your packages accurately and avoid extra fees.

D. Prohibited Items

USPS does not accept certain items for shipment. Please review the List of Prohibited Items carefully and ensure your parcels do not contain any prohibited items before shipping with USPS.

Dropping Off Your Packages

Self-Drop Off

You can drop off your packages at any USPS location convenient for you. Simply bring your prepared parcels to the post office or designated USPS drop-off points.

Return Label Validity and Cancellation

Return labels may expire if not used for a period of time after creation. To avoid resource waste from invalid labels, any label not used within 25 days of creation will be automatically canceled. If you still need to arrange a return, create a new return label and remind your customer to ship the package within 25 days.

Basic Liability Coverage from USPS

USPS provides basic liability coverage for lost or damaged shipments. The coverage amount depends on the shipping service used:

• Priority Mail: Coverage up to $100 USD
• Ground Advantage: Coverage up to $100 USD

If your USPS shipment sent via SHOPLINE Shipping is lost or damaged, you are advised to file a claim with USPS within 7 to 30 days of the shipping date. Please note that submitting a claim does not guarantee compensation.

Calculating USPS Shipping Rates

Shipping rates are determined based on SHOPLINE's account with USPS.

• Parcel weight is calculated using either the actual weight or the dimensional (DIM) weight, whichever is greater. 
  

  Note: The DIM weight is calculated as: DIM Weight (kg) = (Height × Width × Length) in cm ÷ 6000.

• USPS measures both the actual and dimensional weight at its distribution center and charges the shipping fee based on the higher value.

• Special rates apply for shipments sent to military post offices (APO/FPO/DPO) and U.S. overseas territories. For more details, please refer to the Charging Rules on Designated Destinations.

Getting Support for USPS Shipments

If you're using USPS through SHOPLINE Shipping and need assistance, refer to the table below to find the right point of contact.