# EDGAR Filing Document

**Accession Number:** 0001051010
**File Stem:** 0000276776-23-000004
**Filing Date:** 2023-1
**Character Count:** 3147
**Document Hash:** ee7fdc498c895facf60362c43f32c711
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000276776-23-000004.hdr.sgml**: 20230103

**ACCESSION NUMBER**: 0000276776-23-000004

**CONFORMED SUBMISSION TYPE**: 497J

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230103

**DATE AS OF CHANGE**: 20230103

**EFFECTIVENESS DATE**: 20230103

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** PIONEER SERIES TRUST XII
- **CENTRAL INDEX KEY:** 0001051010
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497J
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-42105
- **FILM NUMBER:** 23501206

**BUSINESS ADDRESS:**
- **STREET 1:** 60 STATE STREET, 5TH FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02109-1820
- **BUSINESS PHONE:** 617-742-7825

**MAIL ADDRESS:**
- **STREET 1:** 60 STATE STREET, 5TH FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02109-1820

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PIONEER INDEPENDENCE FUND
- **DATE OF NAME CHANGE:** 19971208

## Series and Classes Contracts Data

### Pioneer Disciplined Growth Fund (Series ID: S000004009)

| Class ID   | Class Name                                      | Ticker Symbol   |
|:---|:---|:---|
| C000011217 | Pioneer Disciplined Growth Fund: Class A Shares | PINDX           |
| C000033500 | Pioneer Disciplined Growth Fund: Class C Shares | INDCX           |
| C000033501 | Pioneer Disciplined Growth Fund: Class Y Shares | INYDX           |
| C000199249 | Pioneer Disciplined Growth Fund: Class K Shares |  |
| C000210599 | Pioneer Disciplined Growth Fund: Class R        |  |

### Pioneer MAP High Income Municipal Fund (Series ID: S000070201)

| Class ID   | Class Name                             | Ticker Symbol   |
|:---|:---|:---|
| C000223251 | Pioneer MAP High Income Municipal Fund | HIMUX           |

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[Logo - AMUNDI US]

							January 3, 2023

VIA ELECTRONIC TRANSMISSION
---------------------------

Securities and Exchange Commission
Division of Investment Management
100 F Street, NE
Washington, DC  20549

Re:  Pioneer Series Trust XII (the "Trust")
     (File Nos. 333-42105 and 811-08547)
     CIK No. 0001051010

Ladies and Gentlemen:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended, we
certify that the forms of prospectus and statement of additional information
relating to Pioneer Disciplined Growth Fund and Pioneer MAP - High
Income Municipal Fund, each a series of the Trust, that would have been
filed under paragraph (c) of Rule 497, do not differ from that contained
in Post-Effective Amendment No. 43 to the Trust's registration statement
on Form N-1A, filed electronically with the Securities and Exchange
Commission on December 22, 2022 (SEC Accession No. 0001193125-22-310886).

If you have any questions  concerning the foregoing certification, please
contact me at (617) 422-4388.

					 Very truly yours,

					/s/ Daniel J. Hynes
    					-------------------------
    					Daniel J. Hynes
    					Senior Legal Product Manager

cc:     Christopher J. Kelley, Esq.
        Toby R. Serkin, Esq.

Amundi Asset Management US, Inc.
60 State Street
Boston, MA  02109-1820

```