There's a difference between "i havent been paid fully yet" and "I'm hesitant to give them the source code until I get fully paid. I've already invoiced them and they are late on payment according to the terms of the invoice. They've been late before also so this is new territory. I tried talking to the client but he wouldn't answer my call."
Typically 1099s submit an invoice and are paid according to the terms of the invoice. Saying you haven't been paid yet when you haven't invoiced is a bit dramatic and such anxiety is unlikely to win you any future business/referrals.
invoices are submitted early this year (like january), they paid some, but there are still quite a chunk of money they havent paid yet
like you said, it is "a bit dramatic" and stupid i would think if you havent submitted an invoice(s) and expected to be paid.
and i would think you will agree with me that january 2013 invoice is very late in october 2013.
and also imho, having been living in the valley for 18 years as a developer, sometimes old clients are like leeches, because they keep asking lower and lower prices, and before you know it, they want you to compete in pricing with a guy in india, or they will send out somekind of cease and desist email firing you for being not punctual etc, when all this time you have been helping them and giving them really low price. Trust me that all good things must eventually come to an end.
No doubt that, if they are 9-10 behind on paying invoices, there's cause to worry. The question is why you are still doing work for them? That makes little sense. I understand having older clients around for years but the combination of slow/late paying and hustling you for lower rates would drive most of us off.
Typically 1099s submit an invoice and are paid according to the terms of the invoice. Saying you haven't been paid yet when you haven't invoiced is a bit dramatic and such anxiety is unlikely to win you any future business/referrals.
Which is it?