There are a few reasons for which we do not offer embroidery on the backs of t-shirts or polos, due to the weight of the garments material the embroidery is heavy and can pull down on the neck making the item feel uncomfortable. the second reason is again down to the material and the number of stitches this can cause the logo to curl up after washing and look untidy.
Most professional companies will not offer this service to ensure the quality and comfort of the items provided.