Below are a selection of JNF labels overprinted for Postal Use, May 2-22nd 1948.
From May 2nd, The Mandate Post Offices began to close and the Jewish People's Administration authorised the use of JNF labels to be used for postage purposes.
They were overprinted 'Do'ar' in Purple and Red for use in the Tel Aviv area and in a black circle for use in Haifa.
Areas cut off from the fighting during this pre-Independence period issued their own stamps which today are much sought after by Israel Collectors.
Stamps of the Mandate were in use until the day after Independence was declared, May 15th. They were though, in short supply.
The overprinted [by Handstamp] JNF labels were used until May 22nd, a week after the first Do'ar Ivri issue on May 16th.
The Haifa example below is has an inverted overprint. This was quite common as often, in haste, whole sheets were handstamped thus !






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