Got this online :
b.A last page with barcodes and a signature line will automatically be created.
c.Print, sign and date the form.
d.For best results: •print on white, bond-quality, non-glossy paper and
•use a laser printer.
e.Place the barcode page on top of your package. If you have more than one package, place a separate barcode page on each one.
"My interpretation from above is "it should be single sided otherwise the barcode page might come as a print of last page back page and hence basis this, it should be one side printing.
IF anyone notice anything on this, please share.