Plaintiffs were granted a preliminary injunction from the district court enjoining Defendant Georgia state officials from rejecting voter registration forms submitted to the state in a single mailed package. Defendants appealed, and we affirm.
I
The Wesley Foundation is a charitable and educational organization affiliated with the predominantly African-American Alpha Phi Alpha fraternity. In June 2004 the Foundation conducted a voter registration drive at a shopping mall in DeKalb County, Georgia, at which they provided and collected voter registration forms for submission by mail. Among the forms they collected was one from Plaintiff Earline Crawford, who was already registered to vote, but gave the Foundation her form so as to notify the state of her changed address. The Foundation collected sixty-four forms and mailed them in a single package to the Secretary of State’s office for processing.
Shortly thereafter, the Secretary’s office rejected the forms because, in its view, Georgia law prohibited anyone but registrars, deputy registrars or otherwise authorized persons from accepting or collecting voter registration forms. Because no authorized person participated in the voter registration drive, it would not accept the applications. The package was postmarked before the state- and federally-imposed deadlines (though the individual forms were not postmarked), and ,it is undisputed that had each of the forms been sent individually, the Secretary would have accepted them.
In their amended complaint, Plaintiffs allege violations of their rights under the National Voter Registration Act of 1993, 42 U.S.C. §§ 1973gg et seq. (2004), the Voting Rights Act of 1965, 42 U.S.C.1973 et seq. (2004) and the First, Fourteenth, and Fifteenth Amendments to the United States Constitution.1 They also filed .a motion for preliminary injunction, which the district court granted. Defendants now appeal, arguing that the Plaintiffs lack standing to bring their claims and that the district court erred in granting the injunction.
II
A. Standing
We review the legal question of standing de novo. See London v. Wal-Mart Stores, Inc., 340 F.3d 1246, 1251 (11th Cir.2003). In doing so, we review factual determinations made at the trial level as part of consideration' of motions for preliminary injunctions for clear error. *1352This That and The Other Gift and Tobacco, Inc. v. Cobb County, 285 F.3d 1319, 1321 (11th Cir.2002).
To have standing, and therefore a justiciable “case or controversy,” the plaintiffs must satisfy three constitutional requirements. Lujan v. Defenders of Wildlife, 504 U.S. 555, 560-61, 112 S.Ct. 2130, 119 L.Ed.2d 351 (1992). They must establish that: (1) they have suffered a particularized, concrete injury to a legally protected interest (injury in fact); (2) the injury is fairly traceable to the challenged action (causation); and (3) it is likely that the injury may be redressed by judicial action (redressability). Region 8 Forest Serv. Timber Purchasers Council v. Alcock, 993 F.2d 800, 805 (11th Cir.1993). Defendants argue that Plaintiffs fail to satisfy these requirements.
1. Ms. Crawford
Defendants claim first that Ms. Crawford did not allege in the Complaint the now-argued specific injury of being unable to vote in her new home precinct. We disagree. The Complaint alleges that the state rejected her form in violation of Ms. Crawford’s rights under the NVRA, which specifically protects her right to use the federal registration form to notify the state of a change of her address. See 42 U.S.C. §§ 1973gg-4(a)(3), gg-6(a)(l)(B). Such allegations are sufficient to satisfy the requirements of notice pleading. See United States v. Baxter Intern., Inc., 345 F.3d 866, 881 (11th Cir.2003) (“Because the Federal Rules embody the concept of liberalized 'notice pleading,’ a complaint need contain only a statement calculated to give the defendant fair notice of what the plaintiffs claim is and the grounds upon which it rests.”) (internal citations omitted).
Defendants also claim that Ms. Crawford lacks standing because as an already registered voter, she suffered no injury that can be traced to the state. We reject the argument. Ms. Crawford’s alleged injuries are sufficient to show injury-in-fact for standing purposes. A plaintiff need not have the franchise wholly denied to suffer injury. Any concrete, particularized, non-hypothetical injury to a legally protected interest is sufficient. See Parker v. Scrap Metal Processors, Inc., 386 F.3d 993, 1003 (11th Cir.2004). Moreover, where an alleged injury is to a statutory right, standing exists “even where the plaintiff would have suffered no judicially cognizable injury in the absence of statute.” Warth v. Seldin, 422 U.S. 490, 514, 95 S.Ct. 2197, 45 L.Ed.2d 343 (1975).2
Ms. Crawford’s alleged injuries are also “fairly traceable” to Defendants’ actions. Defendants’ causation argument, that the root of Crawford’s attempted address change’s inadequacy was her own lack of compliance with Georgia’s requirements, conflates standing with the merits of the case. Causation in the standing context is a question of fact unrelated to an action’s propriety as a matter of law. To establish causation a plaintiff need only demonstrate, as a matter of fact, “a fairly traceable connection between the plaintiffs injury and the complained-of conduct of the defendant.” Parker, 386 F.3d at 1003. Ms. Crawford’s alleged injuries flow directly from the denial of her registration form.3
*1353 2. Wesley Foundation Plaintiffs
Defendants claim that the Wesley Foundation Plaintiffs also lack standing. To this end, they argue that these Plaintiffs had no “right” to conduct voter registration drives, and therefore they cannot allege injury in their inability to conduct one as they wish. In other words, Defendants claim that whatever injury Plaintiffs suffered, it was not an injury to a “legally protected” interest that can be traced to their actions. We disagree.
Defendants! argument is based on the flawed notion that because the NVRA does not provide for private registration drives as one of the modes of registration it mandates, it prohibits them. . The NVRA requires the states to accept voter registration forms in three ways beyond those through which the states voluntarily elect to accept them: registration by mail, registration in person at various official locations (so-called “registration places”), and registration in conjunction with driver licensing. See 42 U.S.C. § 1973gg. In the first instance, these methods are not intended to be exclusive; rather, the Act seeks to encourage voter registration by setting a floor on registration acceptance methods. See id. at § 1973gg-l(b); gg2(a). More importantly, the use of a private registration drive is not a mode of registration at all. Rather, it is a method by which private parties may facilitate the use of the mode of registration by mail, for which the Act does provide.
Nowhere does the NVRA prohibit or regulate voter registration drives; rather, it impliedly encourages them. See id. at § 1973gg-4(b) (directing the secretaries of state to make the federal forms provided for in the Act available, “with particular emphasis on making them available for organized voter registration programs”).4 The only provisions regulating mailed forms are unrelated to the legitimacy of voter drives such as the Foundation’s; instead, these provisions regulate the states by ensuring that voters delivering valid forms in a timely fashion by mail are registered. Id. at §§ 1973gg-2(a)(2), gg-6(a)(1)(D). In other words, they regulate the forms’ final content and method of delivery, but do not regulate their dissemination or collection. Thus the Act does not prohibit registration drives, but, because it limits the states’ ability to reject forms meeting its standards (which privately collected, mailed forms would do), it does protect them. See § 1973gg-6(a)(1)(D) (stating that the states “shall ... ensure” that voters delivering timely, valid forms are registered); § 1973gg-2(a)(2) (states “shall accept” the federal mail-in form). For these reasons, it is clear that the Foundation’s right to conduct voter registration drives is a legally protected interest.
As with Defendants’ causation arguments regarding Ms. Crawford, we reject the claim that because the Foundation engaged in actions Defendants consider prohibited, the Plaintiffs are the “cause” of any injuries suffered. Whether such a denial was appropriate, and whether Plaintiffs acted within their rights in conducting their drive as they did, are questions relevant not to standing, but to the dispute on *1354the merits (so long as Plaintiffs’ asserted interests are legally protected). For standing purposes, it is clear that Plaintiffs’ alleged injuries are traceable to the Defendants’ rejection of their mailed bundle of registration forms.
The NVRA protects Plaintiffs’ rights to conduct registration drives and submit voter registration forms by mail, and Defendants’ denial of the sixty-four forms here was a clear invasion of that interest, traceable to Defendants’ actions, and redressa-ble by injunctive relief.5 As such, Plaintiffs have standing to sue.
B. Preliminary Injunction
Having determined that the Plaintiffs have standing, we turn to the district court’s decision to grant Plaintiffs’ motion for preliminary injunction. Preliminary injunction decisions, “about the viability of a plaintiffs claims and the balancing of equities and the public interest, are the district court’s to make and [this Court] will not set them aside unless the district court has abused its discretion in making them.” Cumulus Media, Inc. v. Clear Channel Communications, Inc., 304 F.3d 1167, 1171 (11th Cir.2002). Only if the Court finds that error in the “apprehension or application of the law will [it] subject the entirety of a preliminary injunction order to plenary review.” Id.
To grant a motion for a preliminary injunction, the trial judge must determine that the moving party has shown that “(1) it has a substantial likelihood of success on the merits; (2) irreparable injury will be suffered unless the injunction issues; (3) the threatened injury to the movant outweighs whatever damage the proposed injunction may cause to the moving party; and (4) if issued, the injunction would not be adverse to the public interest.” Siegel v. LePore, 234 F.3d 1163, 1176 (11th Cir.2000) (en banc).
1. Substantial Likelihood of Success
Defendants contend primarily that the suit does not carry the requisite “substantial likelihood of success on the merits.” They argue first that the Plaintiffs’ NVRA claims are basically preemption claims, and that there is no conflict between Georgia and federal law regarding the acceptance of voter registration forms. In essence, their claim is that the NVRA only requires that mailed registration forms be accepted when delivered both in a timely fashion and pursuant to additional state requirements. See 42 U.S.C. § 1973gg-6(a)(1)(B),(D). Because the Act only regulates the content of the form itself and the timing of its delivery, they argue, the Act allows the state to regulate the method of delivery.
This argument is unpersuasive. By requiring the states to accept mail-in forms, the Act does regulate the method of delivery, and by so doing overrides state law inconsistent with its mandates. The Act simply requires that valid registration forms delivered by mail and postmarked in time be processed. Id. at §§ 1973gg-2(a)(2), gg-6(a)(l)(D). The forms here appear to have satisfied these requirements. The postmark on the package applied to all its contents, thereby rendering each form postmarked, and no party disputes the forms’ timeliness.
This case is unlike Association of Community Organizations for Reform Now v. Miller, 912 F.Supp. 976, 986-88 (W.D.Mich.1995), aff'd, 129 F.3d 833 (6th Cir.1997), on which Defendants rely to argue that their anti-“bundling” policy is a *1355legitimate protection against voter fraud. That case upheld a Michigan statute providing that when voter cards sent to registrants were returned as undeliverable, those persons were deemed unregistered. This is not the kind of rule at issue here. First, the Michigan rule, did not implicate the clear directives of the mail-in registration processes protected by the NVRA. It dealt with the evaluation of registrations after submission and initial registration. Second, unlike the Michigan statute, the Georgia policy does little, if anything, to prevent fraud or assist in the assessment of voter eligibility. Defendants assert that their practices protect confidential voter information and prevent fraudulent submission, but the risk of exposure and fraud is equal whether forms are sent in bulk or individually, so long as third-party handling of any kind is allowed (and Defendants admit the NVRA does not prohibit third-party submission of individual forms).
Defendants also claim that because the NVRA provides for registrars to serve various functions for the state — most significantly assisting with and receiving registration forms — citizens may not serve similar roles in private voter registration drives. See 42 U.S.C. § 1973gg-5(a)(4),(5). As noted, though, the Act does not regulate private voter organization; it only imposes duties on the states. The Act does not dictate that only state actors may perform the simple function of assisting citizens with voter registration forms, and Plaintiffs do not claim authority to receive such forms on behalf of the state.. Similarly, Defendants are not helped by their citation to a Georgia statute providing for the creation of official “registration places” where applications for registration are “received.” See Ga. Comp. R. & Regs. § 183-l-6-.03(3)(c),(k)(l). That' statute is simply not implicated either by pre-sub-mission third-party handling of forms or by registration by mail. In any case, even were that statute implicated by Plaintiffs’ actions here, it would have to give way to the clear mandates of the NVRA, which Plaintiffs appear to have satisfied.6
2. Irreparable Injury, Balancing Harms, and the Public Interest
None of the remaining factors for consideration of a motion for preliminary injunction is favorable to the Defendants. The associational and franchise-related rights asserted by the Plaintiffs were threatened with significant, irreparable harm, and the injunction’s cautious protection of the Plaintiffs’ franchise-related rights is without question in the public interest. In contrast, the harm and costs threatened to the state by these registration forms were minimal, if they existed at all. The administrative burden of opening bundled forms instead of individual forms is negligible, and the public interest in protecting against electoral fraud does not *1356appear to be compromised by the temporary loss of Georgia’s anti-bundling rule.
AFFIRMED.
. Plaintiffs include Ms. Crawford, four individual volunteers for the Foundation, and the Foundation itself.
. Defendants abandon on appeal the argument advanced before the district court that they cured Ms. Crawford's injuries by sending her an additional form to fill out a few days before the registration deadline.
. Though Defendants do not pursue the question, Ms. Crawford’s injuries are also redress-able: the injunctive relief provided by a favorable decision in this case would redress Ms. Crawford's injuries by permanently withdrawing the additional registration requirements Defendants seek to impose upon her. *1353The fact that the issuance of the preliminary injunction forced the state to accept the sixty-four forms for purposes of elections occurring during this suit’s pendency does not affect our analysis. Standing is to be "determined as of the time ... the plaintiffs complaint is filed,” and is not altered by events unfolding during litigation. Focus on the Family v. Pinellas Suncoast Transit Auth., 344 F.3d 1263, 1275 (11th Cir.2003).
. The Act mandates that the states accept a particularly defined federal registration form (hereinafter "federal form”) for purposes of registration for federal elections. See id. at § 1973gg-7(a)(2). This was the form used by the Plaintiffs.
. As with Ms. Crawford, redressability is both conceded and satisfied as to the Foundation Plaintiffs.
. That Plaintiffs' actions here do not implicate § 183 — 1—6—.03(3) eviscerates Defendants' argument that the preclearance provisions of the Voting Rights Act, 42 U.S.C. § 1971 et seq., which were allegedly followed in adopting that provision (but not the anti-bundling rule), support the legitimacy of the state's actions. In any case, as the Plaintiffs and amici have noted, preclearance has no bearing on the legitimacy of a given rule, procedure or action with regard to other federal electoral laws. See Reno v. Bossier Parish, 528 U.S. 320, 335, 120 S.Ct. 866, 145 L.Ed.2d 845 (2000) ("[Plreclearance under § 5 affirms nothing but the absence of backsliding''). Defendants' related claim that the private voter registration drive (which1 was not "pre-cleared”) was invalid falls short because the preclearance provisions of the Act simply do not apply to private actors. 42 U.S.C. § 1973c.