Does the middle initial match the beginning letter of your middle name? If so, use the entire middle name when filling in the forms, there is no conflict there.
Some of my documents only have my middle initial, but my PP does show my given names in their entirety.
Don't leave it out, that would probably cause a mis-match; not including it when it matches an initial actually shown on official documents is probably not a good idea.
CharlieD10,
So I just want to clarify to be sure. I will be the sponsor... so, even though my passport only has my middle initial (J) written, on the sponsor information, I should write my complete middle name? Or since my passport says only my middle initial, on the sponsor information I should only write the initial as well?
From what I understand, you said to write what is on your passport, and in your case that happens to be your complete name, including all middle names...
Thanks for clarifying!
Tink