Be careful when contracting with an unincorporated association. Wiping out a $2.6 million judgment in a breach of contract case against Teamsters Local 700 (as Local 726’s successor), the Illinois Supreme Court concluded that a lease/purchase agreement, or LPA, with 1550 MP Road LLC that was signed by Local 726’s secretary-treasurer (Thomas Clair) — and authorized by a majority of the local’s executive board — was void ab initio based on failure to comply with the Property of Unincorporated …