Writing "Bismillah" on Cards

Question :

On a wedding invitation card, for example, is it permissible to write "Bismillah," an important question when we consider that most people throw away such cards either in the street or in a garbage can?

Answer:

Based on the following Hadith, it is permissible to write "Bismillah" on wedding invitation cards or in letters. The Messenger of Allah ﷺ said:
"Every important affair that does not begin with Bismillah is cut off."

Moreover, the Messenger of Allah ﷺ would himself begin letters by mentioning Allah's Name. Nonetheless, it is not permissible for someone who receives such cards or letters to throw them away in the trash or in any place where they may be debased. The same goes for newspapers; they should not be used as a substitute for a mat to eat upon. In this situation, the sin is upon the person who throws away these papers, cards, or publica- tions, and not upon their author.

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