What is aci usps?

ACI USPS is the United States Postal Service's (USPS) Address Change Indicator service provided by Address Correction Services. This service allows businesses to update and maintain accurate mailing lists by identifying changes of address for individuals and businesses that have filed a change of address with the USPS. The ACI USPS service helps businesses reduce undeliverable mail and improve the efficiency of their mailing operations. It is a cost-effective solution for businesses looking to maintain accurate customer databases and improve their mail deliverability rates.