Letters of Collaboration--Guidelines and Samples
Guidelines (from Lucy Deckard, Research Development and Grantwriting News, Apr. 2011)
Be sure to respect the difference between a letter of collaboration (which says very specifically what the person will do for or with you) and a letter of recommendation or support, which is generally disallowed, at least by NSF.
Page 2 is a rough template to help you get your letters started.
Sample letters (from bpearson)
Contents of document (4 samples):
#1 and #2 are drafts for community partners to tweak and put on their letterhead.
#3 a letter I wrote as “UMass infrastructure”
#4 a letter for a research partnership