From TM-XML-Wiki

Key identifying the address for correspondence

CorrespondenceAddressKeyType (Complex Type)
No	Element	Type	Card.	Definition
1	CorrespondenceAddressIdentifier	IdentifierType	1..1	Identifier for correspondence address
2	CorrespondenceAddressParty	CorrespondenceAddressPartyType	0..1	Kind of addressee of the correspondence address
Type of:				CorrespondenceAddressKey

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