LifeinAsia - 11:05 pm on Jul 12, 2013 (gmt 0)
...only it is NOT in writing.
Danger, Will Robinson!
First, repeat after me: "When doing anything that involves someone else in businesses, I will ALWAYS get everything in writing!"
Second, repeat it 200 times or until it is completely ingrained into your brain.
Next, tattoo it onto the back of your hand so you can remind yourself of it every day.
I agree that you have to contact your partner and try to work things out amicably. But, you should also plan for the worst and assume that there will be some resistance. Dig up every scrap of "evidence" you can find related to your agreement, whether it's an e-mail, a bar napkin, or any historical evidence of sharing the revenue 50% (e.g., cancelled checks or bank statements and matching statements showing the relevant revenue).
Assuming that your partner agrees to put something in writing, make sure it is very detailed with specifics. "both legally entitled to 50% of the website and its earnings" is very vague. Specify who makes the decisions about what and if expenses (hosting fees, domain registration fees, etc.) are deducted before or after the 50-50 split. And just as critical- include a "divorce clause" so that one or both of you can exit the partnership and under what conditions.