To retain NALC membership, retiring members must sign a Form 1189 (Dues Check-off Provision).
Article 2, Section 1(e) of the NALC Constitution establishes this requirement:
“A Form 1189 (Dues Check-off Provision) must be signed by all retiring members within the NALC who wish to retain their membership in said organization, effective October 1, 1982.”
The Form 1189 authorizes the Office of Personnel Management (OPM) to deduct union dues from retiree annuities.