[1] Plaintiff and his attorney, respondent Patrice Solberg, first argue that the trial court lost jurisdiction over the case once it was voluntarily dismissed, and therefore it was error subsequently to entertain a motion for sanctions. Appellants attempt to distinguish this case from others because of the fact that defendants filed the motion for sanctions after the voluntary dismissal was entered, rather than before the action was terminated. We find this distinction unimportant, and appellants’ argument to the contrary unpersuasive.
*489Under N.C. Gen. Stat. § 1A-1, Rule 41(a)(1) (1990) a plaintiff may take a voluntary dismissal of his case without prejudice by filing a notice of dismissal at any time before resting his case. The effect of such a voluntary dismissal is to terminate the action, and no suit is pending thereafter on which the court can enter a valid order. Collins v. Collins, 18 N.C. App. 45, 50, 196 S.E.2d 282, 286 (1973). In Bryson v. Sullivan, 330 N.C. 644, 653, 412 S.E.2d 327, 331 (1992), the North Carolina Supreme Court clearly established, however, that a voluntary dismissal pursuant to Rule 41(a) “does not deprive the court of jurisdiction to consider collateral issues such as sanctions that require consideration after the action has been terminated.” See also Cooter and Gell v. Hartmarx Corp., 496 U.S. 384, 396, 110 L. Ed. 2d 359, 375-76 (1990); Lassiter v. N.C. Farm Bureau Mut. Ins. Co., 106 N.C. App. 66, 70, 415 S.E.2d 212, 215, disc. review denied, 332 N.C. 148, 419 S.E.2d 573 (1992); Higgins v. Patton, 102 N.C. App. 301, 305, 401 S.E.2d 854, 856 (1991), overruled on other grounds by Bryson v. Sullivan, 330 N.C. 644, 663, 412 S.E.2d 327, 337 (1992).
Plaintiff correctly submits that in Bryson, and the other cases cited above, the Rule 11 motion for sanctions was filed before the voluntary dismissal. He appears to argue that these cases establish continuing jurisdiction over only collateral issues that are pending at the time a voluntary dismissal is taken, not those that are filed after a voluntary dismissal. Such a narrow reading of these cases is unwarranted.
Defendant points to Overcash v. Blue Cross and Blue Shield, 94 N.C. App. 602, 381 S.E.2d 330 (1989) as controlling in this case. In Overcash, the defendant filed a Rule 11 motion and notice of appeal after the trial court granted partial summary judgment for plaintiff, awarded attorney’s fees and costs, and plaintiff voluntarily dismissed his remaining claims. This Court held that the “termination of the action and defendant’s filing of notice of appeal did not automatically deprive the court of jurisdiction to impose sanctions pursuant to Rule 11.” Id. at 617, 381 S.E.2d at 340.
In addition, this Court recently ruled in VSD Communications, Inc. v. Lone Wolf Publishing Group, Inc., 124 N.C. App. 642, 478 S.E.2d 214 (1996), that a Rule 11 motion filed after a voluntary dismissal was viable, because such motions “have a life of their own and they address the propriety of the adversary proceedings that have previously occurred in the case without regard to whether the adversary proceedings in question are continuing when the motion ... is *490filed.” Id. at — , 478 S.E.2d at 216 (citing Bryson, 330 N.C. at 664, 412 S.E.2d at 338). Neither Overcash nor VSD Communications, however, fully addresses the question of post-dismissal motions for sanctions, and we find this an appropriate occasion to clarify the issue.
Determining the propriety of post-dismissal sanctions motions may be assisted by analysis of the analogous Federal Rules of Civil Procedure. “The North Carolina Rules of Civil Procedure, including Rule 11, are, for the most part, verbatim recitations of the federal rules. Decisions under the federal rules are thus pertinent to our analysis.” Tittle v. Case, 101 N.C. App. 346, 349, 399 S.E.2d 373, 375 (1991) (citations omitted), overruled on other grounds by Bryson v. Sullivan, 330 N.C. 644, 657, 412 S.E.2d 327, 334 (1992).
In Cooter and Gell v. Hartmarx Corp., 496 U.S. 384, 110 L. Ed. 2d 359 (1990) the Supreme Court focused on the purposes and policies of both Rule 11 and Rule 41(a) and implied that whether a motion for sanctions is filed before or after voluntary dismissal is unimportant.
Both Rule 41(a)(1) and Rule 11 are aimed at curbing abuses of the judicial system, and thus their policies, like their language, are completely compatible. ... [A] voluntary dismissal does not eliminate the Rule 11 violation. Baseless filing puts the machinery of justice in motion, burdening courts and individuals alike with needless expense and delay. Even if the careless litigant quickly dismisses the action, the harm triggering Rule ll’s concerns has already occurred. Therefore, a litigant who violates Rule 11 merits sanctions even after a dismissal. ... If a litigant could purge his violation of Rule 11 merely by taking a dismissal, he would lose all incentive to “stop, think and investigate more carefully before serving and filing papers.”
Id. at 397-98, 110 L. Ed. 2d at 377 (quoting Amendments to Federal Rules of Civil Procedure, 97 F.R.D. 165, 192 (1983) (Letter from Judge Walter Mansfield, Chairman, Advisory Committee on Civil Rules (Mar. 9, 1982))). See also Muthig v. Brant Point Nantucket, Inc., 838 F.2d 600, 604 (1st Cir. 1988) (noting that neither Rule 11 nor Rule 41 contains post-voluntary dismissal limitations); Szabo Food Service, Inc. v. Canteen Corp., 823 F.2d 1073, 1079 (7th Cir. 1987) (likening Rule 11 sanctions to contempt sanctions for purposes of post-voluntary dismissal jurisdiction), cert. dismissed, 485 U.S. 901, 99 L. Ed. 2d 229 (1988).
The Court in Cooter further noted that Rule 11 itself contains no time limits on filing motions: “District courts may, of course, ‘adopt *491local rules establishing timeliness standards,’ for filing and deciding Rule 11 motions.” Cooter and Gell, 496 U.S. at 398, 110 L. Ed. 2d at 377 (quoting White v. New Hampshire Dept. of Employment Security, 455 U.S. 445, 454, 71 L. Ed. 2d 325, 333 (1982)). The Court recognized, therefore, that absent a rule to the contrary, sanctions motions may appropriately be filed after a voluntary dismissal.
Neither Rule 11 nor Rule 41 of the North Carolina Rules of Civil Procedure contains explicit time limits for filing Rule 11 sanctions motions. We find the reasoning in Cooter persuasive and decline to impose any time limits contrary to the plain language of the rules. We agree, though, that “a party should make a Rule 11 motion within a reasonable time” after he discovers an alleged impropriety. Muthig, 838 F.2d at 604. Defendant asserts that the alleged impropriety became apparent not when the complaint was filed, but only during the course of discovery. We find that in this case defendant filed her Rule 11 sanctions motion within a reasonable time of detecting the alleged impropriety.
Plaintiff also contends that the doctrine of laches bars defendant from seeking sanctions after the voluntary dismissal was entered. This alternative time-based argument is unpersuasive, since we find that the Rule 11 sanctions motion was filed in a reasonable time.
Having determined that the trial court did not err in considering the motion for Rule 11 sanctions filed after the voluntary dismissal, we now address appellants’ arguments assigning error to the sanctions orders themselves.
[2] Plaintiff first argues that the evidence was not sufficient to support several of the trial court’s findings of fact in the 8 November 1995 order. A trial court’s order imposing Rule 11 sanctions is reviewable de novo under an objective standard. Turner v. Duke University, 325 N.C. 152, 165, 381 S.E.2d 706, 714 (1989), disc. review denied, 329 N.C. 505, 407 S.E.2d 552 (1991). On de novo review, an appellate court must determine (1) whether the trial court’s conclusions of law support its judgment or determination; (2) whether the trial court’s conclusions of law are supported by its findings of fact; and (3) whether the findings of fact are supported by a sufficiency of the evidence. Id.
Although we are without the benefit of a transcript from the 25 September 1995 sanctions hearing, we find sufficient evidence in the existing record to support the factual findings of which plaintiff complains. Plaintiff first takes issue with the trial court’s finding of fact *492that, other than the allegations in his complaint regarding his concerns that defendant’s treatment may be detrimental to his son’s mental health, plaintiff made no other factual allegation as the basis for filing his action. Plaintiff asserts that an additional allegation in his complaint — that he has joint legal custody of his son — -“constituted a sufficient factual basis” for his complaint. We know of no authority, however, that a mere allegation of joint legal custody in and of itself constitutes a sufficient factual basis for a claim that a party has a legal right to a copy of his child’s mental health records. Plaintiff’s argument is unavailing.
We have reviewed plaintiff’s remaining arguments based on an alleged insufficiency of the evidence and find them without merit.
[3] Plaintiff also takes issue with the trial court’s finding of fact that plaintiff’s suit was not well grounded in fact or warranted by existing law, and further asserts that the trial court erred in concluding that the action was interposed for an improper purpose.
The trial court found, however, that “the true purpose of the action was that Plaintiff sought to discover the contents of Defendant Hawk’s records prior to filing a Motion to Modify the existing Custody Order in District Court[.]” An improper purpose may be inferred, as in this case, “from ‘filing suit with no factual basis for the purpose of “fishing” for some evidence of liability.’ ” Mack v. Moore, 107 N.C. App. 87, 93, 418 S.E.2d 685, 689 (1992) (citation omitted).
On de novo review, this Court must determine whether the trial court’s conclusion is supported by the findings of fact. Turner, 325 N.C. at 165, 381 S.E.2d at 714. The findings of fact complained of, along with others in both sanctions orders, are supported by sufficient evidence in the record. We hold that those findings of fact clearly support the trial court’s conclusion that plaintiff interposed the action for an improper purpose.
[4] Appellants also assert several evidentiary arguments. Respondent Solberg first contends that certain statements she made as counsel for plaintiff were in the course of compromise negotiations and were therefore inadmissible pursuant to Rule 408 of the North Carolina Rules of Evidence. We disagree.
Rule 408 provides that evidence of conduct or statements made in compromise negotiations is inadmissible. N.C. Gen. Stat. § 8C-1, Rule 408 (1992). This rule does not, however, require the exclusion of evidence that is otherwise discoverable or offered for another pur*493pose, merely because it is presented in the course of compromise negotiations. Id.
Respondent Solberg complains specifically that the trial court erred in considering certain allegations made by Carol Holcomb, Susan Lewis, and LeAnn Nease in their affidavits, which were attached to defendant’s motion for sanctions and attorney’s fees. Generally, these allegations questioned plaintiff’s motive for filing the original complaint against defendant.
Holcomb stated that in a phone conversation regarding potential settlement of the case, respondent Solberg said she filed the action to discover if there was any information about plaintiff in the records that might harm him in a suit for modification of custody. Lewis stated that she witnessed a discussion between respondent Solberg and Holcomb after defendant’s deposition in which Solberg said that she wanted access to Dr. Hawk’s medical records, and she did not think she could get them in district court.
Finally, Nease cited a letter to Solberg in which she communicated her understanding about an earlier conversation they had:
“Bécause of the unusual nature of relief you seek for Dr. Renner, I asked you why this case had been filed. You told me that Jordan Renner planned to file a motion regarding a change in visitation but he did not want to file it until he had seen the information in Dr. Hawk’s file because he did not want to ‘file it in the dark[.’]”
Nease stated that respondent Solberg never indicated to her that this understanding of the conversation was incorrect.
Assuming, arguendo, that all of the statements in question were made in the course of compromise negotiations, the evidence was not offered “to prove liability for or invalidity of the claim or its amount.” G.S. § 8C-1, Rule 408. Clearly, defendant offered the evidence to show not that plaintiff’s claim lacked validity, but that it was brought for an improper purpose. “ ‘Since the rule excludes only when the purpose is proving the validity or invalidity of the claim or its amount, an offer for another purpose is not within the rule.’ ” Id. cmt. (quoting Advisory Committee’s Note).
[5] Plaintiff argues that the trial court erred in determining that his refusal to meet with defendant was relevant to the Rule 11 motion. Relevant evidence is defined as “evidence having any tendency to make the existence of any fact that is of consequence to the determination of the action more probable or less probable than it would be *494without the evidence.” N.C. Gen. Stat. § 8C-1, Rule 401 (1992). A trial court’s rulings on relevance are given great deference on appeal. State v. Wallace, 104 N.C. App. 498, 502, 410 S.E.2d 226, 228 (1991), disc. review denied, 331 N.C. 290, 416 S.E.2d 398, cert. denied, 506 U.S. 915, 121 L. Ed. 2d 241 (1992).
In this case, evidence that plaintiff refused to consult with defendant about the state of his son’s mental health is clearly relevant to determining the validity of his claims. Plaintiff alleged in his complaint that he is “unable to determine the nature of the ‘therapy’ being provided to his son”; that he is “unable to adequately evaluate said ‘therapy’ to determine whether it is harmful to his son and whether he should take steps to have said ‘therapy’ terminated”; and that he is “concerned that continuation of said ‘therapy’ may be detrimental to his son’s mental health.” If plaintiff indeed refused to meet with defendant to discuss her treatment of his son, these claims appear to lack credibility. We agree with the trial court that such evidence is relevant to determining whether the action was filed for an improper purpose.
For the reasons stated above, the sanctions orders against plaintiff and respondent Solberg are
Affirmed.
Judges EAGLES and MARTIN, Mark D., concur.