Shipments to the U.S. and Puerto Rico

Starting July 1, 2026, Česká pošta will resume the acceptance of all categories of mail shipments to the United States of America (hereinafter also referred to as the “U.S.”) and Puerto Rico. Due to requirements set by U.S. customs authorities, it is now necessary for further specified shipments to complete customs clearance and pay any applicable fees before the shipment is posted, using the designated application— Zonos Prey.

The followng applies to shipments to the U. S. and Puerto Rico

  • If a customs declaration is required under postal or international regulations, it must be completed exclusively in English, stating the value of the shipment in USD. A list of cases where a paper customs declaration is required is provided in the Shipment Overview.
  • For shipments valued at up to 800 USD that do not fall under the exceptions listed below, the sender is required to submit a customs declaration via the Zonos Prepay application at their own expense prior to mailing the shipment and to pay the associated fees and any applicable customs duties. After fulfilling these obligations, the sender will receive a customs declaration identification number (Declaration ID), which must be provided for the shipment to be accepted for postal transport.
  • For shipments containing only documents weighing up to 50 g, neither a customs declaration nor the declaration ID is required; for shipments containing only documents weighing more than 50 g, a customs declaration form must be included.
  • For shipments to the United States and Puerto Rico, “documents” are defined exclusively as records of information or other communications in written form on paper that are not goods and are not intended for sale or other commercial use. Information stored in digital form, such as on a CD, DVD, or flash drive, is not considered a document.
  • The “Gift” customs category, which is exempt from the payment and remittance of customs duties, may only be used for shipments with a value of up to 100 USD, where both the sender and recipient are individuals and the items are intended exclusively for personal use (they are not samples, commercial materials, or promotional materials). In all other cases, you must select the “Goods” customs category, which requires payment of assessed customs duties before the shipment arrives in the U.S. or Puerto Rico.
  • “Returned goods” are defined as goods manufactured in the U.S. or Puerto Rico and shipped to the U.S. or Puerto Rico from the Czech Republic.
  • Shipments valued at over 800 USD are subject to standard customs procedures in the country of destination—a declaration ID is not required; only a customs declaration must be attached.
  • When sending a shipment that requires a declaration ID, a handling fee is charged in addition to the shipping fee, in accordance with the current Česká Pošta Price List.

Overview of shipments by content and submission requirements

Content (Category) Value Declaration ID Customs Declaration
Documents x NO Up to 50 g: NO
Over 50 g: YES
Gift ≤ 100 USD YES YES
Goods
Returned goods
Commercial samples
Others
≤ 800 USD YES Up to 5 000 CZK: CN 22
Over 5 000 CZK: CN 23
Goods
Returned goods
Commercial samples
Others
> 800 USD NO CN 23

Declaration ID

  • It is the identification number of the customs declaration (1D - a one-dimensional barcode or a 13-character alphanumeric code) that the shipper receives after the shipment has been cleared through customs and the assessed duties have been paid via the Zonos Prepay web/mobile app.
  • It is valid for 5 calendar days from the date of assignment—the shipment must be submitted within this period.
  • Each shipment must have its own Declaration ID; it cannot be reused.
  • Submitting a customs declaration via the Zonos Prepay app is subject to a fee according to Zonos’s currently valid price list:
Content (Category) Fix fee (without a photo) per shipment Fix fee (whit a photo) per shipment Handling fee per shipment
Goods and other content (excluding gifts ≤ 100 USD) up to 800 USD 4,99 USD 3,99 USD 10 % of the assessed duties
Gifts ≤ 100 USD 2,00 USD 1,00 USD does not apply

If the shipment is not submitted within the validity period of the Declaration ID (5 calendar days), the fees and customs duties that have been paid are released from the sender’s account, so no amount is charged.

Where can I get my Declaration ID? Zonos Prepay app

The Zonos Prepay app is used to submit customs declaration data, calculate duties and fees, pay them, and obtain a Declaration ID.

It is available in both mobile and web versions:

How to use Zonos Prepay app: 

  1. Download the app or use the web version, create a user account (register)
  2. Select the shipment category (goods, gift, returned goods, etc.)
  3. Enter shipment details (manually or via photo)
  4. Automatic completion of customs data
  5. Calculation and payment of customs duties, if applicable, and payment of fees to the intermediary
  6. Generate a declaration ID

The information provided in the Zonos Prepay app must be complete and accurate, and must correspond to the actual contents of the shipment. In case of discrepancies, this may result in delays, return of the shipment, or additional customs duties.

The Zonos Prepay app is a service provided by an external provider. Česká pošta is not responsible for its functionality, availability, or the accuracy of customs duty and fee calculations. Česká pošta is not responsible for any discrepancies between the information provided on its website, in the user guide, and in other sources and the information provided by the Zonos provider.

Submitting Shipments to the U. S. and Puerto Rico

When dropping off a shipment at a branch, you must provide the counter clerk with the declaration ID.

Save time by filling out and submitting your information online instead of at the branch, and avoid potential errors - we recommend using the “Send a shipment” service to prepare your shipment data. The declaration ID field has been added to the information you need to fill out.

For contract customers
  • API interface:  enter the Declaration ID for each shipment in the customs declaration data.
  • Podání Online (POL) – manual enty:
    when selecting the destination "USA / Puerto Rico" the Declaration ID field is now available in step 4 of the shipment creation process.
  • Podání Online (POL) – data file import:
    enter the declaration ID in a new column (or at a new position in your data file). In the import configuration, assign the "Declaration ID" fiel to this column.
  • Electronic submission form (ePA): fill in the declaration ID for each shipment, if required.

    Bulk shipment submission at service centers is not available for senders using data files for shipments.
  • Depending on the volume of shipments you are sending, you can choose from two methods for customs clearance and obtaining the Declaration ID:

  • Small volume senders – Zonos Prepay app: generate the Declaration ID individually (one shipment at a time) in the Zonos Prepay https://zonos.com/prepay-app
  • Large volume senders – API Zonos: generate Declaration IDs in bulk via API. Use the Czech Post link to register for the Zonos Dashboard, retrieve your API key there, and set up the API connection.