They'll finance 80 % of manufacturer invoice plus freight .

I've seen this before and it's the same every time with flushing things that are not supposed to be flushed...my personal approach would be to bill the tenants with evidence from the plumbing company (their invoice).

Wife also supplied receipts and invoices substantiating the hours she logged” - Source Checkpoint.

THE PROBLEM is that is was trashed by tenant,we had to evict, cops know about him, menace,tenant stole appliances, punched holes in the wall,smoked drugs, potential buyer did a Meth test and it failed,invoice says $12K in repairs PLUS appliances, damage, etc.WHAT would you do?

For this one, I would send them an invoice, with a copy of the page of the lease where it states they pay trash, and a copy of the bill for the year. 

We only provide the option of refund at the end of the lease.If there is a deficit in the utilities budget account, we invoice the tenants with the amount due at the first of the next month.  

We use QuickBooks, to track everything today, all receipts and invoices are notes at the time of purchase which project it is for, then at the end of every week all the receipts and invoices are entered into quickbooks, by "class" each house gets named by its address as a class, thus it is easy to track everything to the respective house, and very easy to get a report weekly for total expenses for each house, as well as to see how much money you made on each house when it closes.

It is a small town and I know him so although there is some concern that I will be left with an incomplete job and out the cash, my bigger concern is being able to prove the expense if audited.He mentioned that he has a contract for me (and him) to sign and I will of course request and invoice but should I also cover myself by creating additional paperwork to be signed? 

But all and all, it is a great software program.In order for anything to show up as Income, you need to type up an Invoice.  

I recently received an invoice from a contractor on some repairs completed.