When I dropped off our renewals the lady at the desk gave me a receipt.
As for carrying after the license has expired, remember that you do not have a valid license. The
Fact that you have applied is merely a defense at trial: See Delaware Code title 11 section 5 1442:
§ 1442 Carrying a concealed deadly weapon; class G felony; class D felony.
A person is guilty of carrying a concealed deadly weapon when the person carries concealed a deadly weapon upon or about the person without a license to do so as provided by § 1441 of this title.
Carrying a concealed deadly weapon is a class G felony, unless the deadly weapon is a firearm, in which case it is a class D felony.
It shall be a defense that the defendant has been issued an otherwise valid license to carry a concealed deadly weapon pursuant to terms of § 1441 of this title, where:
(1) The license has expired,
(2) The person had applied for renewal of said license within the allotted time frame prior to expiration of the license, and
(3) The offense is alleged to have occurred while the application for renewal of said license was pending before the court.
Now I would assume that a reasonable police officer would not make an arrest due to that clause, and certainly no prosecutor would bring such a case, but I have no idea how this would play out if you were out of state.
I had thought your license was valid if you had applied before May 31st, but when I actually read the law, it is merely an "affirmative defense" to the felony charge of carrying a concealed deadly weapon.