Shalom Rabbi,
In regards of your article about using a credit card, and I asume a debit card on Shabbat.
If on Yom Tov you don’t have an ingredient for food, or you need bread, wine or any other food necessity or even home necessity for human decency (like soap, toilet paper). Can you go to a store and get it with credit/debit card? Can this apply to Shabbat?
This may sound exaggerated, but, even if you carry that product bought with credit/debit on Shabbat in a place with no Eruv, such a product, since it wasn’t affected isn’t forbidden right?
Premade sandwhiches with Kosher ingredients or sushi and food that doesn’t involve a Melakha can be bought on Shabbat/Yom Tov on credit/debit?
In a private place or a place with an Eruv and you walk into a museum, cinema, a tourist place or even a nice beer garden. Can you pay an entrance or order a drink/premade food in the beer garden or restaurant with credit/debit? Both on Shabbat and Yom Tov.


I didn’t understand this part. please clarify what you sre asking…. “This may sound exaggerated, but, even if you carry that product bought with credit/debit on Shabbat in a place with no Eruv, such a product, since it wasn’t affected isn’t forbidden right?”
Otherwise,
The answer to your first question is yes. and Shabbat too.
Premade sandwiches can be bought…yes
Museum, Beer, even soup is fine. The key to be concerned about is that they’re not cooking for you specifically.
Hello Rabbi,
Thank you for your answers.
Clarifying that question.
If you go to a store in a place with no Eruv that is not a Reshut Harabim Deoraita, but a Karmelit, such food or product can be consumed/used on Shabbat and is not affected by the fact that you moved it in a place with no Eruv, right? And this is not מצווה הבאה בעבירה
correct
And one more question. When buying something on credit on Shabbat or Yom Tov, can we read the price? The prohibition is just discuss it on Shabbat or reading it as well?