This technical paper prepared by the Least Developed Countries Expert Group (LEG) provides guidance on synthesis of available information in the preparation of national adaptation programmes of action (NAPAs). It responds to a need identified by least developed country Parties during regional workshops on NAPA preparation held by the LEG in 2003. The paper covers the nature of information to be sought as well as ways to access sources of this information. Collating existing information can facilitate rapid assessment of vulnerability and adaptation and inform the NAPA preparation process.