It's what you send to Grandma in Guatemala with the USPS' Dinero Seguro system
[DOC] [TLE] Country Conditions for Mailing - Guatemala | Postal Explorer - USPS ... [PAR] Antigua Guatemala, Guatemala City, Huehuetenango, Puerto Barrios, 
Quezaltenango, ... Free when sent as First-Class Mail International, First-Class 
Package... [DOC] [TLE] Guatemala | Postal Explorer [PAR] USPS.com home.