J & Q
I'm confused.....

You have the travel agency receipt? Hmmm. You have the cancelled check. I'm assumming you photo copied the front and back instead of giving the Consulate the cancelled check?

Did you give them the actual bank statement or a photo copy? You gave them the actual boarding passes? Do you have pictures of you leaving and arriving at the airport showing the dates, ie a newspaper?
According to the Consulates instructions for the interview, all evidence has to be the
originals, not photo copies.Then I would call the Consulate and ask them exactly what they want. I would if you haven't already, get the actual receipts, cancelled checks, bank statements, boarding passes for the Consulate. Also I would get the travel agency to write a notarized letter stating they sold you the tickets, etc. As well write one letter yourself and if you have pictures of you coming and going to the airport as well as the other members of the family in the pictures, ask them to write letters that they met you at the airport. Then I would submit everything the Consualte asked for and whatever else you have that proves you purchased the tickets and actually were in Vietnam.
Good luck
Peter and Thi
I-129F Sent : 2007-05-26
I-129F NOA1 : 2007-06-11
I-129F RFE(s) :
RFE Reply(s) :
I-129F NOA2 : 2007-10-26
Touched: 2007-11-02
NVC Recieved: 2007-11-16
Consulate recieved ??????
Packet 3 sent 2007-12-11
Packet 3 received 2007-12-24
Packet 3 returned 2007-12-28
Packet 4 sent 2008-1-14
Email Reply with Interview Date 2008-1-23
Interview Date 2008-2-27
Passed Interview 2008-02-27
Visa Pick Up Date 2008-3-05
Received Visa 2008-2-29 (called to pick up earlier)
POE 2008-3-05 Los Angeles
Wedding 2008-4-26