You could line up a spreadsheet of 238409238 names and print off individual letters for each one.Google on how to use: Mail MergeHopefully that helps!!

Several occasions, I have just printed a client's scanned check, cut them to their shape (front and back), endorsed, and snapped via mobile deposit, cleared next day; the client still has the check physically at the time of deposit, of course they mailed them to me usually within a week.

@Hayes Freeman,first suggestion is print off the landlord tenant laws for your state.2nd is organize the office, starting with leases make sure all are current and make a spreadsheet in excel listing unit number, tenant(s) name, lease start, lease end, rent amount.if you don't have something like this already.It's a matter of organizing and keeping current with tenant accounts first, money is what makes the place stay alive. late rent notices out promptly, follow up with pay / quits if needed and retrain the tenants so they know late rent is not OK.. it's a problem... your the new sheriff in town and your also the banker. 

You want to know when a lease is expiring and be able to print out a professional P&L and a P&L by class, and Balance Sheet.  

It was cost effective as there was no loss in postage or printing.

Appreciation due to inflation/money printing.

@Brad Norman looks like it was a print business, there is few machines still in there.

Name needs to be printed and signed.See if tenant discloses sales per the lease?

My opinion after doing some deals on my own and printing up my own contracts off the internet.

You best course of action is to get very familiar with the law - perhaps print it out and read it a few times, that's what I like to do, as it's usually written very poorly and takes a few re-reads to understand - and then review any of your off-the-shelf contracts for clauses that are not legal, and re-write your agreements to reflect that.