SWIFT ISO 15022 - Code REQM Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning Missing Registration Request: Registration request to be completed by the buyer and to be forwarded to the issuer is missing. Usages Message type Field number Tag MT510 (Registration Status and Processing Advice) 12 24B (Reason) MT549 (Request for Statement/Status Advice) 17 24B (Reason)