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PricewaterhouseCoope
rs LLP
125 High Street
Boston, MA 021101707
Telephone (617) 530
5000
Facsimile (617) 530
5001
www.pwc.com


Report of Independent Registered Public Accounting Firm

To the Trustees and Shareholders of Putnam Municipal
Opportunities Trust:

In planning and performing our audit of the financial statements
of Putnam Municipal Opportunities Trust (the Fund) as of and for
the year ended April 30, 2006, in accordance with the standards
of the Public Company Accounting Oversight Board (United States),
we considered the Funds internal control over financial
reporting, including control activities for safeguarding
securities, as a basis for designing our auditing procedures for
the purpose of expressing our opinion on the financial statements
and to comply with the requirements of Form NSAR, but not for the
purpose of expressing an opinion on the effectiveness of the
Funds internal control over financial reporting. Accordingly, we
express no such opinion.

The management of the Fund is responsible for establishing and
maintaining effective internal control over financial reporting.
In fulfilling this responsibility, estimates and judgments by
management are required to assess the expected benefits and
related costs of controls.  A funds internal control over
financial reporting is a process designed to provide reasonable
assurance regarding the reliability of financial reporting and
the preparation of financial statements for external purposes in
accordance with generally accepted accounting principles.  Such
internal control over financial reporting includes policies and
procedures that provide reasonable assurance regarding prevention
or timely detection of unauthorized acquisition, use or
disposition of a funds assets that could have a material effect
on the financial statements.

Because of its inherent limitations, internal control over
financial reporting may not prevent or detect misstatements.
Also, projections of any evaluation of effectiveness to future
periods are subject to the risk that controls may become
inadequate because of changes in conditions, or that the degree
of compliance with the policies or procedures may deteriorate.

A control deficiency exists when the design or operation of a
control does not allow management or employees, in the normal
course of performing their assigned functions, to prevent or
detect misstatements on a timely basis. A significant deficiency
is a control deficiency, or combination of control deficiencies,
that adversely affects the funds ability to initiate, authorize,
record, process or report external financial data reliably in
accordance with generally accepted accounting principles such
that there is more than a remote likelihood that a misstatement
of the funds annual or interim financial statements that is more
than inconsequential will not be prevented or detected.  A
material weakness is a control deficiency, or combination of
control deficiencies, that results in more than a remote
likelihood that a material misstatement of the annual or interim
financial statements will not be prevented or detected.

Our consideration of the Funds internal control over financial
reporting was for the limited purpose described in the first
paragraph and would not necessarily disclose all deficiencies in
internal control over financial reporting that might be
significant deficiencies or material weaknesses under standards
established by the Public Company Accounting Oversight Board
(United States).  However, we noted no deficiencies in the Funds
internal control over financial reporting and its operation,
including controls for safeguarding securities, that we consider
to be material weaknesses as defined above as of April 30, 2006.

This report is intended solely for the information and use of
management and the Board of Trustees of Putnam Municipal
Opportunities Trust and the Securities and Exchange Commission
and is not intended to be and should not be used by anyone other
than these specified parties.


/s/ PricewaterhouseCoopers LLP
June 12, 2006







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