Does KYC require SSN?

Hello there, I'm curious to know if Know Your Customer (KYC) processes typically necessitate the submission of a Social Security Number (SSN). In the realm of cryptocurrency and finance, privacy and security are paramount concerns for many individuals and entities. Could you elaborate on whether SSNs are routinely requested during KYC procedures, and if so, what are the implications for those who may be hesitant to disclose such sensitive information? Additionally, are there alternative methods for verifying identity and fulfilling KYC requirements without the use of an SSN? Thank you for your insights.