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Online ordinations have been the subject of some debates in a few states. PA is among these. According to 23 Pa.C.S.A. § 1503 the following persons can officiate marriages: current and former or retired (Pennsylvania or Pennsylvania District) justices, judges, or district justices (provided the retired magistrates are serving as senior judges or district justices); mayors of any city or borough, a minister, priest, or rabbi of any regularly established church or congregation.
PA has split by county on whether or not an online church qualifies as a "regularly established church." For example, York County does not consider this enough. See Heyer v. Hollerbush. However, a Bucks County Court has approved an online church minister as an officiant in 2008.
At this point, the matter remains undecided in terms of a state-wide ruling. There is also no conclusive ruling for Delaware County. So if you attempt to officiate, then (1) the clerk allows you, it would be presumed fine unless later challenged by one of the parties in an annulment or the county itself in a court action, or, (2) if the clerk does not allow you and you/the parties decide to press the case, then the Court will decide.
So unfortunately, the area of law for this is still very much gray in PA.
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