(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.

The delinquent co-claimant must contribute a proportionate share of the assessment work, expenditures, or maintenance fees within 90 days after the date on which—

(a) The co-claimant received written notice by mail or personal service; or

(b) The 90-day newspaper publication period ended.

If you acquire a delinquent co-claimant's interests in a mining claim or site, you must submit—

(a) Evidence that you properly notified the delinquent co-claimant;

(b) An originally signed and dated statement by all the compliant co-claimants that the delinquent co-claimant failed to contribute the proper proportion of assessment work, expenditures, or maintenance fees within the period fixed by the statute; and

(c) A non-refundable service charge for a transfer of interest, as found in the table of fees in § 3830.21 of this chapter.

(a) If you gave written notice to the delinquent co-claimant by personal service, you must sign and submit a notarized affidavit explaining how and when you delivered the written notice to the delinquent co-claimant.

(b) If you gave written notice to the delinquent co-claimant by mail, you must submit:

(1) A copy of the notice you mailed to the delinquent co-claimant; and

(2) A copy of the signed U.S. Postal Service return receipt from the registered or certified envelope in which you sent the notice to the delinquent co-claimant.

(c) If you published the notice in a newspaper, you must submit:

(1) A statement from the newspaper publisher or the publisher's authorized representative describing the publication, including the beginning and ending dates of publication;

(2) A printed copy of the published notice; and

(3) A notarized affidavit attesting that you conducted a diligent search for the delinquent co-claimant, you could not locate the delinquent co-claimant, and therefore notification by publication was necessary.