One person might be able to keep a secret for a lifetime, but if you live with anyone else it would be nearly impossible. And if more then one person knows it's not a secret.
And the secret part is before you even try to spend it all without someone finding out. Sounds like the makings of a miserable life.
Now if you could claim that money legally as found goods not claimed by a rightful owner, that's a whole different story....
I think there would be dozens of people claiming to be the rightful owner, especially since the auditor is obligated by law to publish a notice of the finding three times.
If I'm reading the Iowa code correctly, if several people claim the money, a judge decides who gets it and how much. I'm not seeing in the Code who pays the costs for publication and court costs (but I can guess).
556F.6 Lost goods or money. If any person shall find any lost goods, money, bank notes, or other things of any description whatever, of the value of five dollars and over, such person shall inform the owner thereof, if known, and make restitution thereof.
When owner unknown. If the owner is unknown, the finder shall, within five days after finding the property, take the money, bank notes, and a description of any other property to the county sheriff of the county or the chief of police of the city in which the property was found, and provide an affidavit describing the property, the time when and place where the property was found, and attesting that no alteration has been made in the appearance of the property since the finding. The sheriff or chief of police shall send a copy of the affidavit to the county auditor who shall enter a description of the property and the value of the property, as nearly as the auditor can determine it, in the auditor’s lost property book, together with the copy of the affidavit of the finder.
Advertisement. The finder of the lost goods, money, bank notes, or other things shall give written notice of the finding of the property. The notice shall contain an accurate description of the property and a statement as to the time when and place where the same was found, and the post office address of the finder. The notice shall: 1. Be posted at the door of the courthouse in the county in which the property was found or at the city hall or police station if found within a city and in one other of the most public places in the county; and 2. If the property found exceeds forty dollars in value, the notice shall be published once each week for three consecutive weeks in some newspaper published in and having general circulation in the county.
Record of publication. Proof of publication of said notice and of the posting thereof shall be made by affidavits of the publisher and the person posting said notices, and said affidavits shall be filed in the office of the county auditor of said county.
Additional publication. The affidavits provided for in section 556F.9 shall be entered by the auditor in the proceedings of the board of supervisors and the same shall be published with the proceedings of said board.
Vesting of title. If no person appears to claim and prove ownership to said goods, money, bank notes, or other things within twelve months of the date when proof of said publication and posting is filed in the office of the county auditor, the right to such property shall irrevocably vest in said finder.
Ownership settled.
In any case where a claim is made to property found or taken up, and the ownership of the property cannot be agreed upon by the finder and claimant, they may make a case before any district judge, associate district judge, or judicial magistrate in the county, who may hear and adjudicate it, and if either of them refuses to make such case the other may make an affidavit of the facts which have previously occurred, and the claimant shall also verify the claim by the claimant’s affidavit, and the district judge, associate district judge, or judicial magistrate may take cognizance of and try the matter on the other party having one day’s notice, but there shall be no appeal from the decision. This section does not bar any other remedy given by law.