My mom's getting bridal shower gifts delivered to her house for me...

which is VERY nice of the people who can't make it to my shower (which is obviously close )...

question is...

Since she won't let me open them until my shower, I don't know who they're from and what they are, so I can't acknowledge their receipt until after my shower. I'm assuming that's okay? Will they understand? I'm assuming so since I'm not supposed to know about the shower, therefore not supposed to know about the gifts. And I would guess that they would want their gifts to be opened at the shower, right?