I'm planning to buy some items from online shop on the internet, but I couldn't find their refund policy on their web-site. So I want to send them an email to check if they guarantee the refund in-case that I don't receive the item.
what tense should I use, all tenses sound well. So I'm not sure.
If I don't receive the item, Do you guarantee the refund?
If I haven’t received the item, Do you guarantee the refund?
If I won't receive the item, Do you guarantee the refund?
If I don't receive the item, do you guarantee a refund?
This is the best as is, since there is no time issue. You just don't have it at the time you might request a refund.
If I haven’t received the item by May 15, do you guarantee a refund?
Use this if there is some promise of delivery by some date.
But don't use
If I won't receive the item, do you guarantee a refund?
unless you can predict the future, or know you will never receive it.
The first option is best:
If I don't receive the item, Do you guarantee the refund?
But it's better to change "the" to "a" as follows:
If I don't receive the item, Do you guarantee a refund?
