[GNC] invoicing

[arthur brogard]

I only have to invoice one tenant is all so it's no big deal.  But I would like to know what I'm doing.
Currently gnucash is not doing it for me though I keep an account for him on it.

I know it is a bit unreal and unusual but I invoice him every week - we've found that's the only way to remind him to pay.

I'm in doubt about two things:
1.  Should my invoices be serially numbered and each one accounted for or is that totally unimportant?

2.   I am in the habit of invoicing for the outstanding amount each week.     Is that okay?        I begin to think it is wrong if accounts are kept of invoices.       Because if his rent were say $300 and he was behind at the beginning by $50 we could get a series over weeks like this:
  Behind: $50.   Invoice:  $350     Pays:   $330                         Invoice   $320     Pays:   $300                         Invoice   $320     Pays:   $300                         Invoice   $320     Pays:   $320.
 Now he's square.     But I've invoiced $1310 and he's paid $1230.  Not at all the same.
 Doesn't matter?  That's just the way to do it?