43 CFR § 3837.21 - How do I notify the delinquent co-claimant that I want to acquire his or her interests?

---
identifier: "/us/cfr/t43/s3837.21"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "43 CFR § 3837.21 - How do I notify the delinquent co-claimant that I want to acquire his or her interests?"
title_number: 43
title_name: "Public Lands: Interior"
section_number: "3837.21"
section_name: "How do I notify the delinquent co-claimant that I want to acquire his or her interests?"
chapter_name: "BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR"
subchapter_number: "C"
subchapter_name: "MINERALS MANAGEMENT (3000)"
part_number: "3837"
part_name: "ACQUIRING A DELINQUENT CO-CLAIMANT'S INTERESTS IN A MINING CLAIM OR SITE"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "43 U.S.C. 2, 1201, 1457; 50 U.S.C. App. 501, 565; 30 U.S.C. 28."
regulatory_source: "68 FR 61078, Oct. 24, 2003, unless otherwise noted."
cfr_part: "3837"
---


# 3837.21 How do I notify the delinquent co-claimant that I want to acquire his or her interests?

(a) You must give the delinquent co-claimant written notice by mail using registered or certified mail, return receipt requested, or by personal service; or

(b) If, after diligent search, you cannot locate the delinquent co-claimant, you must publish notification in a newspaper nearest the location of the claims or sites at least once a week for 90 days.