This section is from the book "Popular Law Library Vol7 Equity Jurisprudence, Trusts, Equity Pleading", by Albert H. Putney. Also available from Amazon: Popular Law-Dictionary.
A bill of interpleader may be filed by a person who has in his possession property of which he does not claim ownership, but which is claimed by two or more persons. To sustain this action it is necessary that the claimants should derive their titles from the same common source, and that neither of them should derive his title from the person who holds the property. Upon proper showing the court will relieve the holder of the property of any personal liability upon his surrender of the property, and will order the parties to interplead to settle their respective rights.
1 Vol. 7, Sub. 22.