Partially TrueFranceIn France, You Can Legally Marry a Dead Person — With the President's BlessingFrance legally permits 'posthumous marriage' (mariage posthume) under Article 171 of the French Civil Code. A surviving partner can marry their deceased fiancé(e), but only with presidential approval and under strict conditions proving the deceased had clearly consented to the union before death.
Partially TruePortugalPortugal Can Chase Your Tax Debts From Beyond the GravePortugal's Civil Code and tax law require that a deceased person's outstanding tax debts be settled from the estate before any assets are distributed to heirs. However, the claim that it is 'illegal to die without paying taxes' is a sensationalized mischaracterization of standard estate debt law.
Confirmed MythUnited KingdomIt's illegal to die in the Houses of ParliamentMYTH! The UK Law Commission explicitly states no such law exists. They also found no law stating that dying in a royal palace entitles anyone to a state funeral.