Multiple copies of an attribute?

[Mike Flynn]

Is it possible for an Idp to send multiple copies of the same attribute?  I have a customer saying they want to send the same attribute multiple times to us with different values.  I have told them we do not support doing that but I was curious if this is an accepted practice or common for an Idp to do this.  We could support this with code updates to manage it but I wanted to see if this is a legit or even common practice.
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