I am taking my client to SSA office to turn in SOAR packet. He does not have any form of identification, recently lost his wallet, will that be an issue?

Unfortunately, yes, it is likely to be an issue if the applicant comes with you to the SSA office. SSA is getting more stringent in needing identification in order to combat benefits fraud.

I encourage you to perhaps find a workaround to doing the in-person interview while you are working on getting a replacement ID for the applicant. In many areas, SOAR caseworkers are able to drop off a completed SSA-8000 and/or arrange for a  phone interview.

If that's not possible, reach out to the SSA Homeless Coordinator/SOAR Point of Contact at SSA prior to the appointment about the lack of ID, so that it doesn't become an issue when you are there with the applicant.