Heimatschein & Meldenzettle Vienna - Mermelstein/Friedler #austria-czech

Helen Kon

Hello. I am looking for proof of residence for my maternal great grandparents; Hersch Mermelstein and Chaje (geb. Friedler) who resided at 12 Hahngasse in the
9th district in Vienna starting with 1914. Per family lore it was unusual for orthodox Jews to reside in that district & that my grandparents got special permission to do. I am seeking documented proof of residence which I believe is called either Heimatschein or Meldenzettle. Am I looking for the correct documents & if so, where or how could I get them?
Thank you in advance for any & all help that you can give me.
Helen Kon
New York City, NY

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