Question: Do we really have to write G-d, or would avoiding using His real names be enough (or should I have written H-s name?)

Answer: Shalom, It is not proper to use G-d’s real name unless in prayer. (Even then we do not say the 4 lettered name outside of the Holy Temple in Jerusalem, which no longer stands.) However, even using one of G-d’s other names should be limited to holy purposes, and not in vain. That’s why we usually use ” Hashem” meaning “The Name.” When G-d’s name is written on paper it creates potential problems, as it should be treated with holiness and not merely tossed in the garbage. For that reason we often write the name incomplete, such as G-d, in order to avoid that concern. Even then, if one writes words of Torah, without G-d’s name, it should also be treated properly.

Rabbi Ephraim Nisenbaum