Definition
When included in a recipient's address, ICO (in care of) denotes that a letter or package is being sent to a third-party, rather than directly to the recipient. For example, a package whoseTo:line reads as follows is being mailed to Lexical Industries, but ultimately intended for John Smith:
Origin
slang.net
Related Terms
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See “ICO” in Corporate Speak, Gen-Z Slang, Pirate Speak, and more.
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