Firstly, I will say I'm not a fan of using bookmarks for a job like this because populating the text inside the bookmark is problematic. Instead, I would recommend you add Content Controls where you want to populate this content.
Secondly, I wouldn't bother with pre-setting the locations in your documents since that seems like an additional step which could simply be part of the Excel macro.
This code is how I would do it for a single document and it could be adapted to sit in your Excel code.
Code:
Sub PopItIn()
FillCC sCCtitle:="Effective Date", sValue:="my date", sFind:="Effective Date: "
FillCC sCCtitle:="Policy Number", sValue:="123456", sFind:="Policy Number: "
FillCC sCCtitle:="Issued To", sValue:="Joe Dirt", sFind:="Issued To: "
End Sub
Function FillCC(sCCtitle As String, sValue As String, sFind As String, Optional aDoc As Document) As ContentControl
Dim aCC As ContentControl, aRng As Range
If aDoc Is Nothing Then Set aDoc = ActiveDocument
If aDoc.SelectContentControlsByTitle(sCCtitle).Count = 0 Then
Set aRng = aDoc.Range
With aRng.Find
.ClearFormatting
.Text = sFind
If .Execute Then
aRng.Collapse Direction:=wdCollapseEnd
Set aCC = aDoc.ContentControls.Add(Type:=wdContentControlText, Range:=aRng)
aCC.Title = sCCtitle
Else
Debug.Print "Neither Content Control nor Anchor text: " & sFind
Exit Function
End If
End With
Else
Set aCC = aDoc.SelectContentControlsByTitle(sCCtitle)(1)
End If
aCC.Range.Text = sValue
End Function