Pulling information from XML to insert into Word Document inside 3rd party application

This is code written for use inside a 3rd party application to pull information from an XML and insert into a word document, I don't know all the mechanics of the fun process of inserting the information into the word document (inside the 3rd party application) so some questions you might have for me are going to be answered with an "I don't know."

I haven't tested the code yet because it is pretty simple and I want to get changes into it before I have to shoot it to production.

Dim oNode
Dim oNodes

Set oNodes = XmlDoc.SelectNodes("/Record/Case/CaseFormsLoad/PartyLoad/Party/PartyPhones/Phone")
If oNodes.Length > 0 Then
    For Each oNode In oNodes
        If oNode.GetAttribute("ConfidentialFlag") = "True" Then
            ReturnData = ReturnData & oNode.Getattribute("PhoneNum") & VbCrLf
        End If
        If ReturnData Is Nothing Then
            ReturnData = ""
        End If
    Next
Else
    ReturnData = ""
End If

and the XML that it is parsing is in the format

A few remarks:

Variables:

I personally like declaring my Variables with a Type (the little safety needs to be used..). And while we're at it, I don't like having lists named as items

Thus I personally(more emphasis) would rather do:

Dim oNode As Variant
Dim oNodeList As Variant

Conditionals

If ReturnData Is Nothing Then
    ReturnData = ""
EndIf

This if-statement evaluates to true only once. Instead you should initialize ReturnData before your For Each and then you can completely remove it:

Set oNodeList = 'shortcutting here
Dim ReturnData = "" As Variant/String
If oNodeList.Length > 0 Then
  ' carry on

StackExchange Code Review Q#49737, answer score: 4