CMRRR

Writing & Everyday abbreviation · Mail and Postal

CMRRR
Stands forCertified Mail, Return Receipt Requested
CategoriesWriting & Everyday

CMRRR stands for Certified Mail, Return Receipt Requested, a mail and postal abbreviation.

Describes a US mail service combination that provides proof of mailing, tracking and a signed receipt returned to the sender, used for legal notices, demand letters and tax correspondence.

Example: The landlord sent the notice via CMRRR, so the signed green card proves the tenant received it.

Usage notes

Certified Mail gives a mailing receipt and electronic delivery confirmation; adding Return Receipt (the green PS Form 3811 or an electronic version) gives the sender the recipient's signature. Contracts and statutes often require notices to be sent this way. Lawyers frequently type the phrase in capitals above the inside address.

More mail and postal abbreviations

  • APO – Army Post Office
  • Attn – Attention
  • BFPO – British Forces Post Office
  • c/o – Care of
  • COA – Change of address
  • DPO – Diplomatic Post Office
  • EMS – Express Mail Service
  • FAO – For the attention of
  • FCM – First-Class Mail
  • FPO – Fleet Post Office
  • HC – Highway contract route
  • HOLLAND – Hope our love lasts and never dies

See all 35 mail and postal abbreviations →