A double security deposit can. 

That being said, I read some (old) reviews that said payments had been hung up (withdrawn from the tenant but not deposited into the landlords bank account longer than 10 days) and customer support was ZERO and their 'ticket' program kept automatically closing out the ticket request without resolution.

As for the security deposit, it will depend on the title that it was collected under, security deposit or advanced rent.

If have inquiry from Furnished Finder, I have an email ready to send them with next steps, usually with background check and information to send deposit, first months rent, etc. and once they agree, i'll send them the door codes.

I've seen people ask for bank statements verifying rent deposits (not always easy to get from sellers).  

For the security deposits - since we will take over is the seller required to transfer those funds to us?

Most S8 tenants have a history of bad decisions and from all that, many have only learned how to game the system.We embrace S8 applicants, but screen them just like any other applicant.Many have an entitlement mentality and try to leverage their S8 voucher and pretend to be helpless:1) A percentage won't apply because they expect a landlord to waive application fees for them.2) Many cry broke and expect a landlord NOT to charge them a security deposit.3) Many of those same S8 tenants trying to avoid paying a security deposit, won't make an effort to call the list of nonprofits we send them that will pay their security deposit if they apply.4) A lot of them try to avoid paying for utilities.

For example, each of my properties has a main account and the sub-accounts under that for CapEx and security deposits.

Security deposits require separate handling - they should be placed in an interest-bearing account.3.

They are are not lenders they say they will close your loan and act as lenders they kept my deposit and sent me to other brokers They are fake with no credentials they are a scam