ADVISORS DISCIPLINED TRUST SERIES 12

Annual notice of securities sold by an investment company (Rule 24f-2)

Annual notice of securities sold by an investment company (Rule 24f-2)

Annual notice of securities sold by an investment company (Rule 24f-2)

Certification of no change in definitive prospectus and statement of additional information (Rule 497(j))

Annual notice of securities sold by an investment company (Rule 24f-2)

Post-effective amendment to an investment company registration statement (Rule 485(b))

Annual notice of securities sold by an investment company (Rule 24f-2)

Definitive prospectus materials of an investment company (Rule 497)

Definitive prospectus materials of an investment company (Rule 497)

Certification of no change in definitive prospectus and statement of additional information (Rule 497(j))

No description available

Registration under 1933 act of securities of unit investment trusts registered on form N-8B-2