SWIFT ISO 15022 - Code ICOL Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning Insufficient Collateral: Insufficient collateral proposed. Usages Message type Field number Tag MT507 (Collateral Status and Processing Advice) 14 24B (Reason) MT549 (Request for Statement/Status Advice) 17 24B (Reason)