: The extension .zip.001 (often mistaken for just .zip ) indicates the first part of a split file. You typically need all subsequent parts (e.g., CP002.zip , CP003.zip ) in the same folder to extract the full content.
: The IRS uses "CP" prefixes for notices. While these are usually physical letters like CP01 (Identity Theft) or CP01A (IP PIN Assignment) , scammers often use these official-sounding codes in malicious email attachments to trick users into opening them. Security and Safety Review CP001.zip
Based on common naming conventions, "CP001.zip" generally refers to one of the following: : The extension
If you have received this file unexpectedly, especially via email, you should treat it with extreme caution. Are Zip Files Safe to Open? especially via email