Photos shared for marriage proposals

In an arranged marriage setting, can we send girl's picture without head scarf to a potential suitor's mother/sister.. not knowing for sure if they will delete the photo if not interested. The family of the suitors have stated many times that they will come to the house for further talk if they like the girl.. which is acceptable in Islam as well. They have the right to see whom they are choosing for their son. If we do not send without hijab pics.. they do not reply and the matter gets closed.. many proposals are going because of this.. please elaborate on this. JazakAllahu khairan