This was exactly the case with us. We had spent about a month getting all the required signatures except for our 1 hold out. Then after numerous attempts at contacting him and an initial NO, he came up with a new scenario that would benefit him after all of our work. Needless to say the paperwork from the previous 18 pilots would have been trashed because you have to specify with whom the trade is requested. We basically told him to pound sand and we really didn't have the time to set up his "new and improved" swap.

They wanted very specific language in the letter that says something to the effect "I approve the training swap between pilot A and C and understand I am not subject to any passover pay due to the mutual swap, etc.."

Good Luck!