
    Desmond D. DILLION, Appellant, v. DEPARTMENT OF REVENUE, Child Support Enforcement Program, Appellee.
    No. 4D15-1434.
    District Court of Appeal of Florida, Fourth District.
    April 27, 2016.
    
      Desmond D. Dillion, • Lauderhill, pro se.
    Pamela Jo Bondi, Attorney General, and Toni C. Bernstein, Senior Assistant Attorney General, Tallahassee, for appellee.
   STEVENSON, J.

. Desmond Dillion (the Father) appeals an order issued by the Department of Revenue which sets forth his child support obligation. We vacate the order and remand.

A noncustodial parent’s child support obligation is calculated based on the financial affidavits submitted by-the parties along with any other information available to the Department. § 409.2563(5)(a), Fla. Stat. (2015). Here, the Father’s financial affidavit claimed the parents have a time-sharing arrangement and that, under the arrangement, their child spends néarly forty percent of hér time at his house. Where a child spends a substantial amount of time with the noncustodial parent under a timesharing arrangement, a reduction in that parent’s child support obligation is mandated. Rodriguez v. Medero, 17 So.3d 867, 871 n. 1 (Fla. 4th DCA 2009); see also § 61.30(11)(b), Fla. Stat. (2015).

When the Father failed to appear before the Administrative Law Judge for the evi-dentiary hearing, the judge closed the file and relinquished jurisdiction back to the Department without making any findings. The Father wrote a letter explaining why he missed the hearing and asking that it be rescheduled. The Department did not respond and issued the order on appeal, finding the Father waived his right to a hearing and calculating his support obligation without any mention of the parties’ time-sharing arrangement.

If an agency enters an order on undisputed evidence, the order must be upheld by this court if it is supported by competent, substantial evidence. See Miley v. Dep’t of Revenue ex rel. Barker, 23 So.3d 1284 (Fla. 4th DCA 2010). However, if this court finds that the validity of the agency action depends on disputed facts, and there has been no hearing prior to agency action, this court “shall” remand for “further proceedings.” § 120.68(7)(a), Fla. Stat. (2016); Brown v. State, Dep’t of Fin. Servs., 899 So.2d 1246, 1248 (Fla. 4th DCA 2005) (remanding for an administrative hearing because of the “need to first make credibility and factual determinations concerning appellant’s claims”).

We find the validity of the Department’s action depends on disputed facts— specifically the existence and terms of the parties’ time-sharing arrangement. It is the public policy of this state to encourage separated parents to engage in frequent and continuing time-sharing. § 61.13(2)(c)l., Fla. Stat. (2015). The Department erred when it failed to conduct an evidentiary hearing because the financial affidavits submitted by the parties presented disputed facts which affected the calculation of the Father’s support obligation.

Vacated and remanded.

GROSS and' FORST, JJ., concur. 
      
      . His letter is in the form of an apology to the Administrative Law Judge explaining that he was fifteen minutes late to the hearing because he was given an incorrect address (by telephone). ' He states that, when he arrived, the security guard would not let him in and told him the judge would not see him. The Department does not dispute this version of what happened on the morning of the hearing; it simply maintains that the Father was given the correct address in the written "notice of hearing” that was mailed to him.
     