Based on sixty-four deemed requests for admissions, the trial court granted summary judgment terminating Sandra Wheeler as joint managing conservator of her daughter, appointing Darrin Green as sole managing conservator (with exclusive rights to determine the child’s residence, education, and medical care), and finding Sandra liable for maliciously prosecuting Darrin. Darrin’s attorney neglected to point out in his summary judgment motion that Sandra — appearing pro se — actually had filed responses six months before the motion was heard, but two days after they were due. Sandra asserts the summary judgment was error, and under the facts presented here we agree.
Sandra gave birth to a daughter in December 1998. She sued to establish Darrin’s paternity in February 1999. By final order in January 2000, Darrin agreed to pay child support and both parents were appointed joint managing conservators.
A succession of disputes regarding visitation and allegations of neglect followed, with Darrin eventually seeking modification to appoint him as sole managing conservator. On January 11, 2002, Darrin’s attorney mailed sixty-four requests for admissions, which in his own words “requested admissions on every element of each claim set forth in Movant’s live petition.”
A certified receipt shows Sandra received them on January 19. The instructions informed her to respond “within 30 days after service of this request.” See Tex.R. Civ. P. 198.2(a).
Sandra sent her responses to Darrin’s attorney by mail on February 15, twenty-seven days after she received the requests. But this was actually thirty-five days after the “mailbox rule” deems they were served on her, thus making them two days late. See Tex.R. Civ. P. 21a (providing service occurs upon mailing and extending response time by three days).
Darrin’s attorney moved for summary judgment, attaching the requests for admission but saying nothing about the responses he had in his file. Sandra — still pro se — filed no response but attended the summary judgment hearing. In fact, she did so twice, as the visiting judge announced at the first setting that the docket was too full and ordered them to return the next morning. When they did, he granted Darrin’s motion.
Sandra thereafter obtained an attorney, who filed a motion for new trial, attached *442 her responses, and argued they were timely. The motion asserted the requests should not have been deemed admitted, the summary judgment should, be set aside, and that Sandra would pay Darrin’s costs if it was. This motion, too, was denied.
Sandra appealed, asserting that summary judgment based on nothing but the deemed admissions was erroneous. The court of appeals affirmed, pointing out that Sandra never responded to the summary judgment and never moved to withdraw her deemed admissions, and that “even in custody cases, a complete failure to follow the rules of pleading and practice cannot be ignored.”
First, Sandra was not required to file a summary judgment response, and the trial court could not grant Darrin’s motion because she failed to do so.
Rhone-Poulenc, Inc. v. Steel,
Second, although Sandra never filed a motion to withdraw deemed admissions or a motion to allow a late response to the summary judgment, the arguments and requests in her motion for new trial were sufficient to put the trial court on notice of exactly that complaint. See Tex.R.App. P. 33.1(a).
Third, Sandra did not waive these arguments by presenting them for the first time in her motion for new trial. We recently held in
Carpenter v. Cimarron Hydrocarbons Corp.
that the equitable principles allowing these arguments to be raised in a motion for new trial do not apply if a party realizes its mistake before judgment and has other avenues of relief available.
We also held in
Carpenter
that the standards for withdrawing deemed admissions and for allowing a late summary-judgment response are the same.
Id.
at 687-88. Either is proper upon a showing of (1) good cause, and (2) no undue prejudice.
Id.; see
Tex.R. Civ. P. 166a(c), 198.3. Good cause is established by showing the failure involved was an accident or mistake, not intentional or the result of conscious indifference.
Carpenter,
*443
Undue prejudice depends on whether withdrawing an admission or filing a late response will delay trial or significantly hamper the opposing party’s ability to prepare for it.
Carpenter,
We recognize that trial courts have broad discretion to permit or deny withdrawal of deemed admissions, but they cannot do so arbitrarily, unreasonably, or without reference to guiding rules or principles.
Stelly,
• depositions, see TransAmerican Natural Gas Corp. v. Powell,811 S.W.2d 913 , 918-19 (Tex.1991);
• interrogatories, see Chrysler Corp. v. Blackmon,841 S.W.2d 844 , 846, 850 (Tex.1992);
• requests for production, see id. at 849-50; GTE Communications Sys. Corp. v. Tanner,856 S.W.2d 725 , 729-30 (Tex.1993); and
• requests for disclosure, see Spohn Hosp. v. Mayer,104 S.W.3d 878 , 883 (Tex.2003) (per curiam).
When requests for admissions are used as intended — addressing uncontroverted matters or evidentiary ones like the authenticity or admissibility of documents—deeming admissions by default is unlikely to compromise presentation of the merits.
See Stelly,
Of the sixty-four admissions deemed here, none sought to discover information: nine deemed circumstances changed so modification was proper, twenty-five deemed modification in the child’s best interest, twenty-seven deemed Sandra liable for malicious prosecution, and three deemed her liable for child support, attorney’s fees, and exemplary damages.
This record contains no evidence of flagrant bad faith or callous disregard for the
*444
rules, nothing to justify a presumption that Sandra’s case lacks merit, and nothing to suggest Darrin was unable to prepare for trial without the admissions.
See id.
at 918;
cf. Cire v. Cummings,
We certainly agree that pro se litigants are not exempt from the rules of procedure.
Mansfield State Bank v. Cohn,
Accordingly, without hearing oral argument, we reverse the court of appeals’ judgment, and remand to the trial court for further proceedings consistent with this opinion. Tex.R.App. P. 59.1.
Notes
. By contrast, if the same elementary mistakes had been made by a lawyer, such a conclusion might well be warranted.
. The rule governing admissions includes as part of the undue-prejudice inquiry that the "presentation of the merits [must] be sub-served” by permitting withdrawal. Tex.R. Civ. P. 198.3(b). The two are different sides of the same coin, as presentation of the merits will suffer (1) if the requesting party cannot prepare for trial, and also (2) if the requestor can prepare but the case is decided on deemed (but perhaps untrue) facts anyway.
