Religion and Gift Baskets

In my industry one needs to be familiar with various religious beliefs and customs.  Why? Well it helps when a client orders a basket for a specific event say a Sympathy Gift.  It's my job to recognize if a certain gift is not acceptable for a recipient within a religion he or she may practice.  I want my client to be happy but also to be appreciated from the recipient and not disturbed that the incorrect gift was given even if with good intentions.