concept to individual cases, however, was not seen as an easy task,
Reilly cited (p 28), as the “nub of the problem”, the difficulty in deciding when two causes of action possess such a measure of identity (see
Schuykill Fuel Corp. v Nieberg Realty Corp., 250 NY 304 ) as to be the same, thus causing a final judgment in one to preclude a claim in another. The Court of Appeals established the following guidelines for resolving this question
(Matter of Reilly v Reid, supra, p 29 ): “A ‘cause of action’ may denote one of several separately stated claims in a pleading based on the same congeries of facts but related to- different legal theories of recovery. A ‘cause of action’ may also denote a separately stated claim on the same congeries of facts, but for different legal relief. But even if there are variations in the facts alleged, or different relief is sought, the separately stated ‘causes of action’ may nevertheless be grounded on the same gravamen of the wrong upon which the action is brought. In the sense of
res judicata or claim preclusion, although there may be separately stated or statable causes of action, they are nevertheless based on the ‘same cause of action’ * * * Nor will differences in legal theory generally avail to permit relitigation of claims based on the same gravamen (see
Matter of Gowan v Tully, 45 NY2d 32 , 36, decided herewith).” The
Reilly court (p 29) quoted with approval section 61 of the Restatement of Judgments, Second (Tent Draft No. 1, 1973), which explains that the claim extinguished by a final judgment “ ‘includes all rights of the plaintiff to remedies against the defendant with respect to
all or any yart of the transaction, or series of connected transactions, out of which the action arose/” (Emphasis added.)
Reilly, therefore, restates the rule of reason and practical necessity governing
res judicata in New York, i.e., “One who has had his day in court should not be permitted to litigage the question anew.”
(Good Health Dairy Prods. Corp. of Rochester v Emery, 275 NY 14 , 18.) This rule has always been that “an existing final judgment rendered upon the merits by a court of competent jurisdiction, is binding upon the parties and their privies in all other actions or suits on points and matters litigated an,d adjudicated in the first suit or
which might have been litigated therein [citations omitted].”
(Israel v Wood Dolson Co., 1 NY2d 116 ,118 [emphasis added]; see, also,
930 Fifth Corp. v King, 42 NY2d 886 .) In the case at bar, the parties to the proceeding under the instant and proposed claims were the same as in the proceeding under Claim No. 59429. The relief sought was the same, viz., payment for professional services, as was the wrong complained of, viz., the withholding of same. Only the theory of recovery and the period of time involved distinguished this from the prior proceeding. Claimant’s new legal theory, which could have been asserted previously (see
Israel v Wood Dolson Co., supra), will not permit relitigation of claims based on the same gravamen of the wrong upon which both actions were brought. (See
Matter of Reilly v Reid, 45 NY2d 24 ,
supra; Matter of Gowan v Tully, 45 NY2d 32 ,
supra.) Moreover, claimant’s current activity, under circumstances and conditions having their source in the same conduct as was subject to review under Claim No. 59429, constituted nothing more than a continuation of the same transaction or series of transactions previously considered (see
Matter of Reilly v Reid, supra). In the face of a final judgment against it, claimant had not altered its conduct, but had maintained past practices, which increased its losses. The conduct was the same. The injury was the same. Only the damages had changed, but this was