Using the Force Command

I have created a command line in SSIS to encrypt files. The job works but prompts for a y/N for the following question

“It is not certain that the key
Belongs to the person named
in the user ID. If you really know what
you are doing, you may answer the next question
with yes.”

This is my command line in SSIS, where would I put the force command and do i have to use two dashes (–force).

Current command line:

" --recipient mycert --encrypt-files " + @[User::receive_file_name]