joinder in civil law falls under two categories: joinder of claims, and joinder of parties. Joinder of claims is addressed in U.S. law by the Federal Rules of Civil Procedure No. 18(a). That Rule allows claimants to consolidate all claims that they have against an individual who is already a party to the case. Claimants may bring new claims even if these new claims are not related to the claims already stated. Note that joinder of claims is never compulsory (i.e., joinder is always permissive), and that joinder of claims requires that the court's subject matter jurisdiction requirements regarding the new claims be met for each new claim (Glossary of Common Bankruptcy Terms)
United Glossary of Bankruptcy Terms 2012.
Glossary of Bankruptcy.