I made it abundantly clear verbally and in writing that I need receipts and invoices for work completed, because it was to be applied against a tenant security deposit. 

Thanks for your response.If current owner has no security deposits in escrow am I allowed to require deposits or renters insurance upon closing the sale?

They will not issue a security deposit check they will only give you a voucher letter to submit a claim.

The items you'll need to track are:Date of ExpenditureVendor Name/Tenant NameAmountCategory of Expense (look at a Schedule E to get this)/ or Revenue Type (Rent, Deposit, Utility Reimb, etc)Property (for when you have multiple properties.Put it in a nice column format like this:Date                     Vendor/Tenant                Amount                      Category                  Property1/1/18                   Joe Smith                         $1500.00                     Rent                           123 Main Street1/5/18                  Home Depot                   - $20.00                        Repairs                       567 Oak StreetSo that when you share your spreadsheet, they can filter for what they want. 

  ( like the guy above is mentioning cant find money) put up their deposit and now have 5 days to close etc.

And since i have a very specific niche and pricing structure I am always the last one they call and the clients usually have run out of time and are going to lose the deal and their deposit if they cant close in 3 to 5 days.. :)  So i turn them to yes or no in 24 to 48 hours so i dont hold anyone up.Just had one today  Pacific Palisades land deal  appraised 50mil but guy will take 20 mil if we can close in 10 working days.. needs dough for a deal in Vegas..

And a cashed check and deposit into your account.   

I'd also talk to the current owner, so if they want, they can let the tenants in that unit know.Hopefully you are getting their deposits transferred to you (it is the tenants' money and you will have to pay it back in full when they go because you don't know the condition of the unit when they moved in). 

Example: Maryland law now is that you can only have 1 month for a security deposit.

Specifically, I would appreciate any links, videos, or other resources that outline my obligations.Do I need to mail the tenant a detailed statement showing any deductions from their security deposit and the remaining balance, if applicable?