Exhibit
31.1




Certification of Principal
Executive Officer


Pursuant
to Section 302 of the Sarbanes-Oxley Act of 2002


and
Securities and Exchange Commission Release 34-46427





I,
Richard A. Rappaport, certify that:





1.  I
have reviewed this report on Form 10-K of SRKP 12, Inc.;





2. Based
on my knowledge, this report does not contain any untrue statement of a material
fact or omit to state a material fact necessary to make the statements made, in
light of the circumstances under which such statements were made, not misleading
with respect to the period covered by this report;





3. Based
on my knowledge, the financial statements, and other financial information
included in this report, fairly present in all material respects the financial
condition, results of operations and cash flows of the registrant as of, and
for, the periods presented in this report;





4. I am
responsible for establishing and maintaining disclosure controls and procedures
(as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control
over financial reporting (as defined in Exchange Act Rules 13a-15(f) and
15d-15(f)) for the registrant and I have:





a)
designed such disclosure controls and procedures or caused such disclosure
controls and procedures to be designed under our supervision, to ensure that
material information relating to the registrant, including its consolidated
subsidiaries, is made known to us by others within those entities, particularly
during the period in which this report is being prepared;





b) designed such internal control over
financial reporting, or caused such internal control over financial reporting to
be designed under our supervision, 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;





c)  evaluated
the effectiveness of the registrant's disclosure controls and procedures and
presented in this report our conclusions about the effectiveness of the
disclosure controls and procedures, as of the end of the period covered by this
report based on such evaluation;





d)
disclosed in this report any change in registrant’s internal control over
financial reporting the occurred during the registrant’s most recent fiscal
quarter (the registrant’s fourth fiscal quarter in the case of an annual report)
that has materially affected, or is reasonably likely to materially affect, the
registrant’s internal control over financial reporting; and





5. I have
disclosed, based on our most recent evaluation of internal control over
financial reporting, to the registrant's auditors and the audit committee of
registrant's board of directors (or persons performing the equivalent
functions):





a) all
deficiencies and material weaknesses in the design or operation of internal
control over financial reporting which are reasonably likely to adversely affect
the registrant's ability to record, process, summarize and report financial
information; and





b) any
fraud, whether or not material, that involves management or other employees who
have a significant role in the registrant's internal control over financial
reporting.





Date:
      February 18, 2009
            
            /s/ Richard A. RappaportRichard
      A. Rappaport
              Principal
      Executive Officer