Postal Service processing delays, state officials warned Thursday. AdvertisementIn the Nov. 4 special election, California voters will decide on Proposition 50, championed by Gov. Postal Service representative Natashi Garvins said in an email that same-day postmarking has never been guaranteed. Garvins said that customers who want a manual postmark should visit a Postal Service location and request one at the counter. The Postal Service isn’t funded by the government but does receive some money from Congress for certain services.