If you need to show proof of funds to the tune of, say, $250,000, then I would suggest depositing $250,000 into a checking account, and showing the other party a copy of the bank statement. 

You could send it by text or email but I think it's best to keep it professional and a certified letter is better for court.Personally, I would offer to pay back her half of the deposit.

We get our rent directly deposited in the typical 5-7 business days, which is expected with ACH.CON's:  They are a newer company and still building some features out. 

Why is accepted the keys and the deposit a bad approach?

If someone is below 600 but everything else measures up we'll offer a contract with an increased security deposit.

This is typically a 30 or 60 day notice.You will need to communicate and coordinate with them for all documentation, leases, SECURITY DEPOSITS, etc. 

The disclosure from the seller says there are no security deposits but one tenant claims she paid one and has proof of it.

We use Quickbooks Online which is pricier at $50+/month but is scalable and allows us to direct deposit contractors, send bills, etc.

We take a $200 pet deposit and charge $25/mo per pet.

Examples: I take a refundable pet deposit instead of a non-refundable one or a monthly fee, I currently pay the whole water bill without taking money from tenants because the duplex is watered together (I will eventually get a separate meter but the outlay is more than I want to pay right now) assuming it doesn't get out of control, paid for the new doorknobs on the bedrooms because the tenants requested locks despite the lead tenant saying they would pay for it, planning to replace the microwave hood simply because it's louder than it should be though it still works, etc.I'm probably losing out on a minimum of $100 monthly.