Changes to the USPS shipping methods in February, 2026
Due to an update to your store's integration with USPS, changes to shipping method names were introduced in February 2026. All your previously enabled USPS shipping methods have been automatically mapped to the new ones. See the table below for the complete mapping info.
To confirm everything is set up correctly, you can review your USPS shipping methods in your store admin, in Shipping & Pickup → USPS.
If you're using negotiated rates, make sure you reconnect your USPS billing account in Shipping & Pickup in your store admin by February 27, 2026, to continue showing them at checkout. Otherwise, UPSP will disconnect your account, and customers will see standard retail USPS rates.
| Legacy shipping method name | Updated shipping method name |
| USPS Ground Advantage™ | USPS Ground Advantage Machinable Cubic Non-Soft Pack Tier 1 USPS Ground Advantage Machinable Cubic Non-Soft Pack Tier 2 USPS Ground Advantage Machinable Cubic Non-Soft Pack Tier 4 USPS Ground Advantage Machinable Cubic Soft Pack Tier 1 USPS Ground Advantage Machinable Cubic Soft Pack Tier 2 USPS Ground Advantage Machinable Cubic Soft Pack Tier 3 USPS Ground Advantage Machinable Single-piece |
| USPS Ground Advantage™ Hold For Pickup | USPS Ground Advantage Machinable Cubic Non-Soft Pack Tier 1 USPS Ground Advantage Machinable Cubic Non-Soft Pack Tier 2 USPS Ground Advantage Machinable Cubic Non-Soft Pack Tier 4 USPS Ground Advantage Machinable Cubic Soft Pack Tier 1 USPS Ground Advantage Machinable Cubic Soft Pack Tier 2 USPS Ground Advantage Machinable Cubic Soft Pack Tier 3 USPS Ground Advantage Machinable Single-piece |
| USPS Priority Mail™ | Priority Mail Machinable Single-piece Priority Mail Machinable Cubic Non-Soft Pack Tier 1 Priority Mail Machinable Cubic Non-Soft Pack Tier 2 Priority Mail Machinable Cubic Non-Soft Pack Tier 4 Priority Mail Machinable Cubic Soft Pack Tier 1 Priority Mail Machinable Cubic Soft Pack Tier 2 |
| USPS Priority Mail™ Flat Rate Envelope | Priority Mail Flat Rate Envelope |
| USPS Priority Mail™ Small Flat Rate Envelope | Priority Mail Flat Rate Envelope |
| USPS Priority Mail™ Gift Card Flat Rate Envelope | Priority Mail Flat Rate Envelope |
| USPS Priority Mail™ Window Flat Rate Envelope | Priority Mail Flat Rate Envelope |
| USPS Priority Mail™ Legal Flat Rate Envelope | Priority Mail Legal Flat Rate Envelope |
| USPS Priority Mail™ Padded Flat Rate Envelope | Priority Mail Padded Flat Rate Envelope |
| USPS Priority Mail™ Small Flat Rate Box | Priority Mail Machinable Small Flat Rate Box |
| USPS Priority Mail™ Medium Flat Rate Box | Priority Mail Machinable Medium Flat Rate Box |
| USPS Priority Mail™ Large Flat Rate Box | Priority Mail Machinable Large Flat Rate Box Priority Mail Machinable Large Flat Rate Box APO/FPO/DPO |
| USPS Priority Mail™ Regional Rate Box A | Priority Mail Machinable Cubic Non-Soft Pack Tier 1 Priority Mail Machinable Cubic Non-Soft Pack Tier 2 Priority Mail Machinable Cubic Non-Soft Pack Tier 4 Priority Mail Machinable Cubic Soft Pack Tier 1 Priority Mail Machinable Cubic Soft Pack Tier 2 |
| USPS Priority Mail™ Regional Rate Box B | Priority Mail Machinable Cubic Non-Soft Pack Tier 1 Priority Mail Machinable Cubic Non-Soft Pack Tier 2 Priority Mail Machinable Cubic Non-Soft Pack Tier 4 Priority Mail Machinable Cubic Soft Pack Tier 1 Priority Mail Machinable Cubic Soft Pack Tier 2 |
| USPS Express Mail™ | Priority Mail Express Machinable Single-piece |
| USPS Priority Mail Express™ Flat Rate Envelope | Priority Mail Express Flat Rate Envelope |
| USPS Priority Mail Express™ Legal Flat Rate Envelope | Priority Mail Express Legal Flat Rate Envelope |
| USPS Priority Mail Express™ Padded Flat Rate Envelope | Priority Mail Express Padded Flat Rate Envelope |
| USPS Priority Mail Express™ Sunday/Holiday Delivery | Priority Mail Express Machinable Single-piece |
| USPS Priority Mail Express™ Sunday/Holiday Delivery Flat Rate Envelope | Priority Mail Express Flat Rate Envelope |
| USPS Priority Mail Express™ Sunday/Holiday Delivery Legal Flat Rate Envelope | Priority Mail Express Legal Flat Rate Envelope Holiday Delivery |
| USPS Priority Mail Express™ Sunday/Holiday Delivery Padded Flat Rate Envelope | Priority Mail Express Padded Flat Rate Envelope |
| USPS Priority Mail Express™ Sunday/Holiday Delivery Flat Rate Boxes | Priority Mail Express Machinable Single-piece |
| USPS Media Mail® | Media Mail Machinable Single-piece Media Mail Nonstandard Single-piece |
| USPS First-Class Mail® International Postcard | First-Class Package International Service Machinable ISC Single-piece |
| USPS First-Class Mail® International Letter | First-Class Package International Service Machinable ISC Single-piece |
| USPS First-Class Mail® International Large Envelope | First-Class Package International Service Machinable ISC Single-piece |
| USPS First-Class Package International Service™ | First-Class Package International Service Machinable ISC Single-piece |
| USPS Priority Mail International® | Priority Mail International ISC Single-piece Priority Mail International Machinable ISC Single-piece Priority Mail International Nonstandard ISC Single-piece |
| USPS Priority Mail International® Small Flat Rate Envelope | Priority Mail International ISC Flat Rate Envelope |
| USPS Priority Mail International® Flat Rate Envelope | Priority Mail International ISC Flat Rate Envelope |
| USPS Priority Mail International® Gift Card Flat Rate Envelope | Priority Mail International ISC Flat Rate Envelope |
| USPS Priority Mail International® Window Flat Rate Envelope | Priority Mail International ISC Flat Rate Envelope |
| USPS Priority Mail International® Legal Flat Rate Envelope | Priority Mail International ISC Legal Flat Rate Envelope |
| USPS Priority Mail International® Padded Flat Rate Envelope* | Priority Mail International Machinable ISC Padded Flat Rate Envelope |
| USPS Priority Mail International® Small Flat Rate Box | Priority Mail International Machinable ISC Small Flat Rate Box |
| USPS Priority Mail International® Medium Flat Rate Box | Priority Mail International Machinable ISC Medium Flat Rate Box |
| USPS Priority Mail International® Large Flat Rate Box | Priority Mail International Machinable ISC Large Flat Rate Box |
| USPS Priority Mail International® Large Video Flat Rate priced box | Priority Mail International Machinable ISC Large Flat Rate Box |
| USPS Priority Mail Express International™ | Priority Mail Express International ISC Single-piece |
| USPS Priority Mail Express International™ Flat Rate Envelope | Priority Mail Express International ISC Flat Rate Envelope |
| USPS Priority Mail Express International™ Padded Flat Rate Envelope | Priority Mail Express International ISC Padded Flat Rate Envelope |
| USPS Priority Mail Express International™ Legal Flat Rate Envelope | Priority Mail Express International ISC Legal Flat Rate Envelope |
| USPS GXG™ Envelopes | Priority Mail Express International ISC Flat Rate Envelope |
| USPS Global Express Guaranteed® (GXG) | Priority Mail Express International ISC Single-piece |
| USPS Global Express Guaranteed® Document | Priority Mail Express International ISC Single-piece |
| USPS Global Express Guaranteed® Non-Document Rectangular | Priority Mail Express International ISC Single-piece |
| USPS Global Express Guaranteed® Non-Document Non-Rectangular | Priority Mail Express International ISC Single-piece |
| USPS Priority Mail™ Hold For Pickup | Priority Mail Machinable Single-piece |
| USPS Priority Mail™ Small Flat Rate Envelope Hold For Pickup | Priority Mail Flat Rate Envelope |
| USPS Priority Mail™ Flat Rate Envelope Hold For Pickup | Priority Mail Flat Rate Envelope |
| USPS Priority Mail™ Gift Card Flat Rate Envelope Hold For Pickup | Priority Mail Flat Rate Envelope |
| USPS Priority Mail™ Window Flat Rate Envelope Hold For Pickup | Priority Mail Flat Rate Envelope |
| USPS Priority Mail™ Legal Flat Rate Envelope Hold For Pickup | Priority Mail Legal Flat Rate Envelope |
| USPS Priority Mail™ Padded Flat Rate Envelope Hold For Pickup | Priority Mail Padded Flat Rate Envelope |
| USPS Priority Mail™ Small Flat Rate Box Hold For Pickup | Priority Mail Machinable Small Flat Rate Box |
| USPS Priority Mail™ Medium Flat Rate Box Hold For Pickup | Priority Mail Machinable Medium Flat Rate Box |
| USPS Priority Mail™ Large Flat Rate Box Hold For Pickup | Priority Mail Machinable Large Flat Rate Box |
| USPS Priority Mail™ Regional Rate Box A Hold For Pickup | Priority Mail Machinable Cubic Non-Soft Pack Tier 1 Priority Mail Machinable Cubic Non-Soft Pack Tier 2 Priority Mail Machinable Cubic Non-Soft Pack Tier 4 Priority Mail Machinable Cubic Soft Pack Tier 1 Priority Mail Machinable Cubic Soft Pack Tier 2 |
| USPS Priority Mail™ Regional Rate Box B Hold For Pickup | Priority Mail Machinable Cubic Non-Soft Pack Tier 1 Priority Mail Machinable Cubic Non-Soft Pack Tier 2 Priority Mail Machinable Cubic Non-Soft Pack Tier 4 Priority Mail Machinable Cubic Soft Pack Tier 1 Priority Mail Machinable Cubic Soft Pack Tier 2 |
| USPS Express Mail™ Hold for Pickup | Priority Mail Express Machinable Single-piece |
| USPS Priority Mail Express™ Flat Rate Envelope Hold For Pickup | Priority Mail Express Flat Rate Envelope |
| USPS Priority Mail Express™ Legal Flat Rate Envelope Hold For Pickup | Priority Mail Express Legal Flat Rate Envelope |
| USPS Priority Mail Express™ Padded Flat Rate Envelope Hold For Pickup | Priority Mail Express Padded Flat Rate Envelope |
| USPS Library Mail | Library Mail Machinable Single-piece Library Mail Nonstandard Single-piece |
| USPS First-Class Mail® Metered Letter | USPS Ground Advantage Machinable Single-piece |
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