MEMORANDUM OPINION AND ORDER

CHRISTOPHER R. COOPER, United States District Judge.

Plaintiff Erik Bullock is a former letter carrier in the District of Columbia who was fired in May 2010 on the grounds that he lied about his absence from work while he was incarcerated. Bullock alleges, however, that he was "targeted for removal by [his] supervisors" after he broke his left ankle in June 2000 because he "could no longer deliver [his] route in the timely manner that was expected of [him]." Compl. at 3. Proceeding pro se, Bullock sues the Postmaster General of the United States Postal Service for discrimination and retaliation in violation of the Rehabilitation Act of 1973, 29 U.S.C. § 701 et seq., which prohibits federal employers from discriminating on the basis of disability and retaliating against individuals for exercising rights under the Act.1

Defendant moves to dismiss the complaint under Rule 12(b)(6) of the Federal Rules of Civil Procedure on the sole basis that the complaint is untimely filed. Def.'s Mot. to Dismiss [Dkt. # 9]. For the following reasons, the motion will be granted in part and denied in part.

I. BACKGROUND

While employed by the Postal Service, Bullock was incarcerated from October 23, 2009 to December 14, 2009. He alleges that he informed his supervisor of his status during a "very short" telephone call from prison in November 2009.2 Compl. at 3. Plaintiff was fired by notice dated May 10, 2010, for "unacceptable conduct and unacceptable attendance/AWOL," based on what were found to be false reasons Bullock had provided for his absence and Bullock's submission of fraudulent medical documentation. Compl. Attach., ECF pp. 7-11 (EEOC Decision at 1-3); Def.'s Mot., Ex. 2 (NALC/USPS Step B Decision).

Bullock's union, the National Association of Letter Carriers (NALC), pursued a grievance and Bullock filed an EEO charge. NALC resolved the grievance on July 12, 2010, at Step B of the dispute resolution process upon "concur[ring] that Management did have Just Cause to remove [plaintiff] from the USPS." Step. B Dec. at 3. The EEOC rendered its final adverse decision on May 9, 2013, and informed plaintiff about his right to file a civil lawsuit within 90 days of his receipt of the decision. See EEOC Dec. at 4.

The Clerk of Court first received Bullock's complaint and application to proceed in forma pauperis on August 29, 2013, see Compl. Attach, ECF pp. 199, 200 (Clerk's stamps), but scratched out that date apparently because the submission was defective. In a form Order dated September 9, 2013, plaintiff was informed that his papers were being returned as non-compliant with the Federal Rules of Civil Procedure and the Local Rules of this Court. He was further told: "If you wish to file a new case please review the enclosed instructions." Pl.'s Response to Mot. to Dismiss [Dkt. # 11] at ECF p. 23. This action was formally filed on October 8, 2013, upon the Court's granting of plaintiff's in forma pauperis application dated September 19, 2013. See Dkt. # 2.

II. LEGAL STANDARD

In deciding the defendant's motion to dismiss under Rule 12(b)(6), the Court may consider the documents attached to the complaint and those incorporated by reference without triggering the conversion requirement of Fed. R. Civ. P. 12(d). Abhe & Svoboda, Inc. v. Chao, 508 F.3d 1052, 1059 (D.C.Cir.2007). The Court may also consider "documents upon which the plaintiff's complaint necessarily relies even if the document is produced not by the plaintiff in the complaint but by the defendant in a motion to dismiss." Ward v. D.C. Dep't of Youth Rehab.Servs., 768 F.Supp.2d 117, 119-20 (D.D.C.2011) (citations and internal quotation marks omitted).

III. ANALYSIS

As part of his opposition, Bullock has produced a postage receipt purporting to show the Clerk of Court's receipt of a mailing on July 30, 2013. Defendant acknowledges the receipt might render the Rehabilitation Act claim timely, but questions its authenticity in light of (1) discrepancies between the date of the receipt and the date of his complaint, and (2) findings that Bullock submitted fraudulent documents to the Postal Service in the past, which factored into his dismissal. Nevertheless, defendant requests that the pending motion be either denied in part without prejudice or held in abeyance so that the parties may conduct discovery on the timeliness of the Rehabilitation Act claim. See Def.'s Reply to Pl.'s Resp. in Opp'n to Mot. to Dismiss at 1-2; see also Legille v. Dann, 544 F.2d 1 (D.C.Cir.1976) (proof of mailing documents to the court creates rebuttable presumption of timely delivery).

Defendant also contends that, to the extent plaintiff is alleging that his union breached its duty of fair representation, this claim should be dismissed now as untimely under the six-month statute of limitations applicable to hybrid claims brought under Section 301 of the Labor Management Relations Act. See Mem. of P. & A. in Support of Def.'s Mot. to Dismiss at 1-2, 11-14; Def.'s Reply at 3-5; see also Cephas v. MVM, Inc., 520 F.3d 480, 485 (D.C.Cir.2008) ("The employee may bring his [hybrid § 301/fair representation] action against the employer, the union, or both[.]") (citing DelCostello v. Int'l Broth. of Teamsters, 462 U.S. 151, 165, 103 S.Ct. 2281, 76 L.Ed.2d 476 (1983)).

The breach of a union's duty of fair representation is an unfair labor practice that "is governed by the six-month [limitations] provision of § 10(b)" of the National Labor Relations Act. DelCostello, 462 U.S. at 172, 103 S.Ct. 2281. Accord George v. Local Union No. 639, Intern. Broth. of Teamsters, 100 F.3d 1008, 1014 (D.C.Cir.1996) (affirming district court's application of "the six-month statute of limitations of section 10(b) to ... duty of fair representation claims"). Plaintiff's claim arose in July 2010 when the union issued its Step B Decision finding just cause for his removal. It is not at all clear from the complaint's allegations that plaintiff is bringing a hybrid claim but the Court agrees that any such claim presented three years after accrual is time-barred.

Accordingly, it is

ORDERED that Defendant's Motion to Dismiss is GRANTED as to any duty of fair representation claim and DENIED as to the Rehabilitation Act claim; and it is further

ORDERED that limited discovery on the timeliness of the Rehabilitation Act claim shall commence immediately and conclude by December 1, 2014. Thereafter, defendant shall have until December 22, 2014, to file a summary judgment motion, plaintiff shall have until January 23, 2015, to file an opposition, and defendant shall have until February 6, 2015, to file any reply.