38 C.F.R. § 20.205 – Rule 205. Withdrawal of appeal.

(a) When and by whom filed. Only an appellant, or an appellant's authorized representative, may withdraw an appeal. An appeal may be withdrawn as to any or all issues involved in the appeal.
(b) Filing—(1) Content. Appeal withdrawals must include the name of the veteran, the name of the claimant or appellant if other than the veteran (e.g., a veteran's survivor, a guardian, or a fiduciary appointed to receive VA benefits on an individual's behalf), the applicable Department of Veterans Affairs file number, and a statement that the appeal is withdrawn. If the appeal involves multiple issues, the withdrawal must specify that the appeal is withdrawn in its entirety, or list the issue(s) withdrawn from the appeal.
(2) Where to file. Appeal withdrawals should be filed with the Board.
(3) When effective. An appeal withdrawal is effective when received by the Board. A withdrawal received after the Board issues a final decision under Rule 1100(a) (§ 20.1100(a)) will not be effective.
(c) Effect of filing. Withdrawal of an appeal will be deemed a withdrawal of the Notice of Disagreement as to all issues to which the withdrawal applies. Withdrawal does not preclude filing a new Notice of Disagreement pursuant to this subpart, a request for higher-level review under 38 U.S.C. 5104B, or a supplemental claim under 38 U.S.C. 5108, as to any issue withdrawn, provided such filing would be timely under these rules if the withdrawn appeal had never been filed.
(Authority: 38 U.S.C. 7105)