¶1This writ of error is to a judgment for the defendants in an action of ejectment to recover the possession of lands in Volusia County, Florida. At the trial the plaintiffs showed a title by conveyance and descent. In support of a plea of not guilty a tax deed dated November 18, 1902, was introduced by the defendants over objections interposed by the plaintiffs. In rebuttal the plaintiffs introduced the testimony of the Clerk of the Circuit Court “that he had no record in his office as to the issuance or forwarding of any notice of the application for said deed to any one,” but recalled that he had sent a notice of the application for the tax deed to a person in another county whom he was told by the applicant for the tax deed was the agent of the person to whom the land -was 'assessed.
¶2The statute in force when the tax deed was. issued requires notice to be published by the Clerk of the Circuit Court of the application for a tax deed, and after giving the form of the deed, provides that “The clerk shall also mail a copy of said notice of 'application for tax deed to the owner of the lands for which a tax deed is applied for. If the owner is unknown, then such notice shall be delivered or mailed to the person last paying taxes on said property.”
¶3In -the case of City of Orlando v. Equitable Building and Loan Association, 45 Fla, 507, text 522, 33 South. Rep. 986, this court approved the rule that “failure to comply strictly with those provisions of tax laws which are intended for the guide of officers in the conduct of business devolved upon them, designed to secure order, system and dispatch in proceedings, and by a disregard of which the rights of parties interested cannot be injuriously affected, will not usually render the proceeding void; but where the requisites prescribed are intended *599for the protection of the citizen, and to prevent a sacrifice of his property, and a disregard of them, might and generally would injuriously affect his rights, they cannot be disregarded, and failure to comply with them will render the proceeding invalid.”
¶4The provision of the statute above quoted requiring the clerk to mail a copy of the. notice, of application for tax deed to the owner of the land, and if the owner is unknown to deliver or mail such notioe to the person last paying taxes on the property, was intended for the benefit of the land owner; and a disregard of the provision when applicable renders the tax deed invalid. See 2 Cooley on Taxation (3rd Ed.) 1034; Black on Tax Titles (2nd Ed.) § 385.
¶5The tax deed recites that the certificate of sale upon which the deed is. based was issued June 7, 1899, but it does not appear by the transcript whether the tax sale certificate was issued to- the State or to a private party, or if it was issued to the State at the sale, when it was purchased from the State by the defendants or their predecessors in title.
¶6The validity of a tax sale certificate and the rights of the holder thereof,' other than a governmental-agency of the State, are to- be determined by the laws in force-ad the time the certificate is acquired. A statute subsequently passed cannot constitutionally impair any ■ of the substantial rights secured to a private holder by the existing laws when the certificate was acquired. See Hull v. State, 29 Fla. 79, 11 South. Rep. 97, 30 Am. St. Rep 95, 16 L. R. A. 308; Gray v. City of St. Paul. Minn. , 116 N. W. Rep. 1111.
¶7But a statute enacted after the acquisition by a private party of a tax sale certificate, requiring a particular and additional- notice to be given to the -owner of the land *600before a deed issues on the certificate, when the right to a ■deed had not become absolute and the giving of the notice imposes no burden upon the holder of the certificate, may not impair any substantial right of the holder of the certificate, and consequently may not be an impairment of vested property rights or a deprivation of property without due process of law. See State ex rel. National Bond & Security Co. v. Krahmer, Minn. , 117 N. W. Rep. 780; Curtis v. Whitney, 13 Wall, 68, 20 L. Ed. 513; Herrick v. Niesz, 16 Wash. 74, 47 Pac. Rep. 414.
¶8. A charge directing a verdict for the defendants should never be given unless it is clear that there is no evidence whatever adduced that could in law support a verdict for the plaintiff. If the evidence is conflicting, or will admit of different reasonable inferences, or if there is evidence tending to prove the issue, it should be submitted to the jury as a question of fact, and not taken from them and passed upon by the judge as a question of law. See German-American Lumber Co. v. Brock, 55 Fla. 577, 46 South. Rep. 740.
¶9It does not appear that the person to whom the clerk sent the notice was the owner of the land or even that he was the agent of the owner if that would suffice; nor does it appear that the person to whom the notice was sent was -the person or the agent of the person last paying taxes on the land. There is n0' showing that any other notice of the application for the tax deed was sent to or by any one.
¶10The testimony as to the notice that was given was introduced by the plaintiffs, and it overcame the effect of the prima facie regularity of the proceeding afforded by the deed under the statuté. It was, therefore, incumbent upon the defendants to show that the notice required by *601the statute was given, or that such notice was not required in this case. The defendant made no showing of compliance, or reason for not complying, with the quoted statute. No title by adverse possession was shown. Under, these circumstances it was error to direct a verdict for the defendants as was done.
¶11The judgment is reversed and the cause is remanded.