<?xml version="1.0" encoding="us-ascii"?><InstanceReport xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><Version>2.4.0.8</Version><ReportLongName>1100 - Disclosure - Commitments and Contingent Liabilities</ReportLongName><DisplayLabelColumn>true</DisplayLabelColumn><ShowElementNames>false</ShowElementNames><RoundingOption /><HasEmbeddedReports>false</HasEmbeddedReports><Columns><Column FlagID="0"><Id>1</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

</LabelSeparator><CurrencyCode /><FootnoteIndexer /><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName /><CurrencySymbol /><contextRef><ContextID>D2013Q2YTD</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001165880</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2013-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2013-06-30T00:00:00</PeriodEndDate><Segments /><Scenarios /></contextRef><UPS /><CurrencyCode /><OriginalCurrencyCode /></MCU><CurrencySymbol /><Labels><Label Key="CalendarSupplement" Id="0" Label="6 Months Ended" /><Label Key="Calendar" Id="1" Label="Jun. 30, 2013" /></Labels></Column></Columns><Rows><Row FlagID="0"><Id>1</Id><IsAbstractGroupTitle>true</IsAbstractGroupTitle><LabelSeparator>

</LabelSeparator><Level>1</Level><ElementName>us-gaap_CommitmentsAndContingenciesDisclosureAbstract</ElementName><ElementPrefix>us-gaap_</ElementPrefix><IsBaseElement>true</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsCalendarTitle>false</IsCalendarTitle><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><FootnoteIndexer /><Cells><Cell FlagID="0" ContextID="" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText /><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat></Cell></Cells><ElementDataType>xbrli:stringItemType</ElementDataType><SimpleDataType>string</SimpleDataType><IsTotalLabel>false</IsTotalLabel><UnitID>0</UnitID><Label>Commitments and Contingent Liabilities</Label></Row><Row FlagID="0"><Id>2</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

</LabelSeparator><Level>2</Level><ElementName>us-gaap_CommitmentsAndContingenciesDisclosureTextBlock</ElementName><ElementPrefix>us-gaap_</ElementPrefix><IsBaseElement>true</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsCalendarTitle>false</IsCalendarTitle><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><PreferredLabelRole>terseLabel</PreferredLabelRole><FootnoteIndexer /><Cells><Cell FlagID="0" ContextID="D2013Q2YTD" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText>&lt;div style="font-size:10.0pt;font-family:Times New Roman;"&gt;
&lt;div style="BORDER-BOTTOM: white 1pt solid; BORDER-LEFT: white 1pt solid; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: white 1pt solid; BORDER-RIGHT: white 1pt solid; PADDING-TOP: 0in;"&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;b&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2"&gt;NOTE 10.&amp;#160; Commitments and Contingent Liabilities&lt;/font&gt;&lt;/b&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;b&gt;&lt;i&gt;&lt;font style="FONT-STYLE: italic; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2"&gt;Commitments&lt;/font&gt;&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2"&gt;As of June&amp;#160;30, 2013, Montpelier had unfunded commitments to invest $1.9 million into two separate private investment funds.&amp;#160; As of December&amp;#160;31, 2012, Montpelier had unfunded commitments to invest $14.8 million into three separate private investment funds.&lt;/font&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2"&gt;Montpelier&amp;#8217;s letter of credit facilities and trust arrangements are secured by collateral accounts containing cash, cash equivalents and investments that are required to be maintained at specified levels. See Note 5.&lt;/font&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;b&gt;&lt;i&gt;&lt;font style="FONT-STYLE: italic; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2"&gt;Lloyd&amp;#8217;s Central Fund (the &amp;#8220;Central Fund&amp;#8221;)&lt;/font&gt;&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2"&gt;The Central Fund is available to satisfy claims if a member of Lloyd&amp;#8217;s is unable to meet its obligations to policyholders.&amp;#160; The Central Fund is funded by an annual levy imposed on members which is determined annually by Lloyd&amp;#8217;s as a percentage of each member&amp;#8217;s written premiums (0.5% with respect to 2013 and 2012).&amp;#160; In addition, the Council of Lloyd&amp;#8217;s has power to call on members to make an additional contribution to the Central Fund of up to 3.0% of their underwriting capacity each year should it decide that such additional contributions are necessary.&amp;#160; Montpelier currently estimates that its 2013 obligation to the Central Fund will be approximately $1.1 million.&lt;/font&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2"&gt;Lloyd&amp;#8217;s also imposes other charges on its members and the syndicates on which they participate, including an annual subscription charge (0.5% of written premiums with respect to 2013 and 2012) and an overseas business charge, levied as a percentage of gross international premiums (defined as business outside the U.K. and the Channel Islands), with the percentage depending on the type of business written. Lloyd&amp;#8217;s also has power to impose additional charges under Lloyd&amp;#8217;s Powers of Charging Byelaw.&amp;#160; Montpelier currently estimates that its 2013 obligation to Lloyd&amp;#8217;s for such charges will be approximately $2.4 million.&lt;/font&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;b&gt;&lt;i&gt;&lt;font style="FONT-STYLE: italic; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2"&gt;Litigation&lt;/font&gt;&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2"&gt;Montpelier is subject to litigation and arbitration proceedings in the normal course of its business.&amp;#160; Such proceedings often involve insurance or reinsurance contract disputes which are typical for the insurance and reinsurance industry.&amp;#160; Montpelier&amp;#8217;s estimates of possible losses incurred in connection with such legal proceedings are provided for as loss and loss adjustment expenses on its consolidated statements of operations and are included within loss and loss adjustment expense reserves on its consolidated balance sheets.&lt;/font&gt;&lt;/p&gt;&lt;/div&gt;
&lt;p style="MARGIN: 0in 0in 0pt;"&gt;&amp;#160;&lt;/p&gt;
&lt;div style="BORDER-BOTTOM: white 1pt solid; BORDER-LEFT: white 1pt solid; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: white 1pt solid; BORDER-RIGHT: white 1pt solid; PADDING-TOP: 0in;"&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2"&gt;During 2011, Montpelier Re was named in a series of lawsuits filed by a group of plaintiffs in their capacity as trustees for senior debt issued by Tribune on behalf of various senior debt holders.&amp;#160; See Note 4.&lt;/font&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2"&gt;Other than the Tribune litigation referred to above, Montpelier had no other unresolved legal proceedings, other than those in the normal course of its business, at June&amp;#160;30, 2013.&lt;/font&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;b&gt;&lt;i&gt;&lt;font style="FONT-STYLE: italic; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2"&gt;Concentrations of Credit and Counterparty Risk&lt;/font&gt;&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2"&gt;Financial instruments which potentially subject Montpelier to significant concentrations of credit risk consist principally of investment securities, insurance and reinsurance balances receivable and reinsurance recoverables as described below.&lt;/font&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2"&gt;Montpelier&amp;#8217;s investment guidelines prohibit it from owning an undue concentration of a single issue or issuer, other than U.S.-backed securities, and it did not own an aggregate fixed maturity investment in a single entity, other than securities issued by the U.S. government and U.S. government-sponsored enterprises, in excess of 10% of the Company&amp;#8217;s common shareholders&amp;#8217; equity available to the Company at June&amp;#160;30, 2013.&lt;/font&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2"&gt;In accordance with its investment controls and guidelines, Montpelier routinely monitors the credit quality of its fixed maturity investments, including those involving investments in: (i)&amp;#160;European sovereign nations; (ii)&amp;#160;U.S. state and local municipalities, Alternative A, subprime and commercial mortgage-backed securities; (iii)&amp;#160;non-agency collateralized residential mortgage obligations; and (iv)&amp;#160;those securities that benefit from credit enhancements provided by third-party financial guarantors.&lt;/font&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2"&gt;Certain of Montpelier&amp;#8217;s derivative instruments are subject to counterparty risk. Montpelier routinely monitors this risk.&lt;/font&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2"&gt;Montpelier underwrites the majority of its business through independent insurance and reinsurance brokers. Credit risk exists to the extent that any of these brokers may be unable to fulfill their contractual obligations to Montpelier.&amp;#160; For example, Montpelier is frequently required to pay amounts owed on claims under policies to brokers, and these brokers, in turn, pay these amounts to the ceding companies that have reinsured a portion of their liabilities with Montpelier. In some jurisdictions, if a broker fails to make such a payment, Montpelier might remain liable to the ceding company for the deficiency. In addition, in certain jurisdictions, when the ceding company pays premiums for these policies to brokers, these premiums are considered to have been paid and the ceding insurer is no longer liable to Montpelier for those amounts, whether or not the premiums have actually been received.&lt;/font&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2"&gt;Montpelier remains liable for losses it incurs to the extent that any third-party reinsurer is unable or unwilling to make timely payments under reinsurance agreements.&amp;#160; Montpelier would also be liable in the event that its ceding companies were unable to collect amounts due from underlying third-party reinsurers.&lt;/font&gt;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&amp;#160;&lt;/p&gt;
&lt;p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2"&gt;Under Montpelier&amp;#8217;s reinsurance security policy, reinsurers are typically required to be rated &amp;#8220;A-&amp;#8221; (Excellent) or better by&amp;#160;A.M. Best (or an equivalent rating with another recognized rating agency) at the time the policy is written. Montpelier also considers reinsurers that are not rated or do not fall within this threshold on a case-by-case basis if collateralized up to policy limits, net of any premiums owed.&amp;#160; Montpelier monitors the financial condition and ratings of its reinsurers on an ongoing basis.&lt;/font&gt;&lt;/p&gt;&lt;/div&gt;
&lt;p style="MARGIN: 0in 0in 0pt;"&gt;&amp;#160;&lt;/p&gt;
&lt;/div&gt;</NonNumbericText><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat></Cell></Cells><ElementDataType>nonnum:textBlockItemType</ElementDataType><SimpleDataType>na</SimpleDataType><ElementDefenition>The entire disclosure for commitments and contingencies.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef

 -Publisher FASB

 -Name FASB Interpretation (FIN)

 -Number 14

 -Paragraph 3

 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

 -Publisher FASB

 -Name Accounting Standards Codification

 -Topic 210

 -SubTopic 10

 -Section S99

 -Paragraph 1

 -Subparagraph (SX 210.5-02.25)

 -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef

 -Publisher FASB

 -Name Accounting Standards Codification

 -Topic 825

 -SubTopic 20

 -Section 50

 -Paragraph 1

 -URI http://asc.fasb.org/extlink&amp;oid=6449706&amp;loc=d3e16207-108621



Reference 4: http://www.xbrl.org/2003/role/presentationRef

 -Publisher FASB

 -Name Accounting Standards Codification

 -Topic 460

 -SubTopic 10

 -Section 50

 -Paragraph 8

 -URI http://asc.fasb.org/extlink&amp;oid=6398077&amp;loc=d3e12565-110249



Reference 5: http://www.xbrl.org/2003/role/presentationRef

 -Publisher FASB

 -Name Accounting Standards Codification

 -Topic 450

 -SubTopic 20

 -Section 50

 -Paragraph 4

 -URI http://asc.fasb.org/extlink&amp;oid=6952336&amp;loc=d3e14435-108349



Reference 6: http://www.xbrl.org/2003/role/presentationRef

 -Publisher FASB

 -Name Accounting Standards Codification

 -Topic 440

 -SubTopic 10

 -Section 50

 -Paragraph 2

 -URI http://asc.fasb.org/extlink&amp;oid=6394976&amp;loc=d3e25287-109308



Reference 7: http://www.xbrl.org/2003/role/presentationRef

 -Publisher FASB

 -Name Statement of Financial Accounting Standard (FAS)

 -Number 5

 -Paragraph 9, 10, 11, 12

 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



</ElementReferences><IsTotalLabel>false</IsTotalLabel><UnitID>0</UnitID><Label>Commitments and Contingent Liabilities</Label></Row></Rows><Footnotes /><IsEquityReport>false</IsEquityReport><ReportName>Commitments and Contingent Liabilities</ReportName><MonetaryRoundingLevel>UnKnown</MonetaryRoundingLevel><SharesRoundingLevel>UnKnown</SharesRoundingLevel><PerShareRoundingLevel>UnKnown</PerShareRoundingLevel><ExchangeRateRoundingLevel>UnKnown</ExchangeRateRoundingLevel><HasCustomUnits>true</HasCustomUnits><IsEmbedReport>false</IsEmbedReport><IsMultiCurrency>false</IsMultiCurrency><ReportType>Sheet</ReportType><RoleURI>http://www.montpelierre.bm/role/DisclosureCommitmentsAndContingentLiabilities</RoleURI><NumberOfCols>1</NumberOfCols><NumberOfRows>2</NumberOfRows></InstanceReport>
