Effective May 29, 2025, the Postal Service™ is revising the Individual Country Listing for Costa Rica in Mailing Standards of the United States Postal Service, International Mail Manual (IMM®) to request that the mailer provide the addressee’s fixed or mobile phone number and email address, if available, to items mailed to Costa Rica.
This revision is based on a formal request that Correos de Costa Rica (the designated postal operator of Costa Rica) made through the Universal Postal Union via International Bureau Circular 73, dated April 29, 2019.
Mailing Standards of the United States Postal Service, International Mail Manual (IMM)
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Individual Country Listings
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Costa Rica
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows (adding “1” before the first entry:]
2. On each Registered Mail item and on the customs form of each item mailed to Costa Rica, the mailer must provide the addressee’s fixed or mobile phone number and email address, if available. This will help Correos de Costa Rica ensure the speedy delivery of such items.
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Although effective May 29, 2025, the Postal Service will incorporate this revision into the next edition of the online IMM, which is available via Postal Explorer® at pe.usps.com.
— Product Classification,
Product Solutions, 5-29-25
