This Checklist sets out the key issues to consider when drafting or reviewing a collateral warranty. For an introduction to collateral warranties generally, see Practice Note: What are collateral warranties? In the UK construction industry, the grant of third party rights, is an essential part of the project documentation that needs to be put in place for construction projects. Such rights are often granted through the use of collateral warranties. Although many in the industry clung to the traditional collateral warranty route, the alternative route of granting rights under the Contracts (Rights of Third Parties) Act 1999 (C(RTP)A 1999) has slowly become more popular. For more information on the granting of third party rights under C(RTP)A 1999, see Practice Note: The Contracts (Rights of Third Parties) Act 1999 in construction contracts. Requirement to provide warranties • Does the underlying building contract, consultant’s appointment or sub-contract (as appropriate) require the intended warrantor to provide the warranty (see for example: Collateral warranties clauses)? If not, the intended warrantor is not obliged to give the warranty that is being requested but, if asked, may