Office(,) to herein complainant originally recruited and processed by the former agency, MARS.iii[3] On appeal to the National Labor Relations Commission, petitioner prayed for the reversal of the POEAs decision and the invalidation of Section 6, Rule I, Book III of the POEA Rules, citing the rule against unjust enrichment. Thus, it alleged: 14.1 Macaraya was deployed January 30, 1990 by MARS; she stayed and worked in Riyadh only for three (3) months and 13 days and was repatriated on May 13, 1990. She filed the complaint against MARS on May 14, 1990. Hence, her cause of action ripened and/or accrued as of that early date as against MARS, her placement agency. Further, it is significant to state here that MARS filed its answer to the complaint on July 5, 1990 wherein it made admissions and averred its affirmative defenses by way of confession and avoidance of liability. How then could ABD be made to `assume full and complete responsibility to all contractual obligations under the aforecited Rule when the accreditation of M.S. Al Babtain in its favor was made only on September 3, 1990 per POEA records, and was only `impleaded in this case by motion of MARS on January 9, 1992? 14.2 When MARS filed its answer on July 5, 1990, long before ABD was made a party respondent, it caused a joinder of issues in the case. Under the well-settled principle of estoppel, it cannot (after filing such answer) now be heard to say one and a half years later (on January 9, 1992 when it impleaded ABD in the case) that ABD must `be summoned to answer for the claims of herein Complainant. x x x. That late, and in filing its answer to the complaint, MARS is certainly estopped from shifting to ABD whatever liability it had under the contract it entered into with Macaraya, or for any violations thereof by its principal, or any POEA rules/regulations - - which all accrued/occurred when accreditation was NOT yet transferred to ABD. Ignoring these facts/ circumstances constitute a clear case of grave abuse of discretion on the part of the Hon. Administrator.iv[4] (Underscoring supplied) By resolution dated March 21, 1994,v[5] the NLRC dismissed the appeal. Petitioners motion for reconsideration met the same fate on August 10, 1994.vi[6] Hence, this petition for certiorari. Petitioner alleges that in the assailed resolution of March 21, 1994, the NLRC merely quoted the findings of the POEA Administrator and concluded that it should assume full and complete responsibility to the contractual obligation of the foreign principal to Macaraya. Petitioner questions the failure of the NLRC to make categorical rulings on the issues it had raised in its memorandum on appeal and, therefore, the NLRC should be charged with evasion of positive duty or a virtual refusal to perform the duty enjoined by law. MARS had allegedly already answered the complaint when petitioner became the transferee recruitment agency. Petitioner was impleaded in the case one-and-a-half years after the filing of MARS answer to the complaint. Hence, the failure of MARS to prove the legality of Macarayas dismissal from employment should not mean that the same burden should fall upon petitioner who was not even privy to Macarayas

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