Worst case I had ended up in a lawsuit in small claims (<$5000). Won a judgement, but I had the lucky chance to wait in the courtroom all day to watch cases in front of me come in where people were trying to get their judgement paid. Court did discovery of assets etc because people did not know where their clients assets where. Won my judgement end of the day. Now have to collect.
Few weeks later my ex-wife was lucky enough to be sitting in a local bank talking with a teller and notice the client's POP items on her desk. Banker then told my ex-wife that client was a regular, good customer. She called me, I went to the judge, Sheriff delivered the hold on all the assets in the bank at 9:00am next morning. I was paid by 3:00pm. Didn't release the hold until next day.
Moral of the story: 50% CUF, balance as "NO Tickee, NO Laundry". The 50% covers what I need to operate, balance is profit. CUF is the ONLY terms for photography "Cash Up Front".
With the internet, everyone thinks photos are free and worth nothing. I"ve gotten out of photography alone, but still employ the same terms. On big projects, it's all "certified funds" or wire transfer. Have yet to sue another client in 18 years since that event. Not sure I would ever want to be published in a magazine where they pay on terms. You WILL be chasing the money.