This is one of the situation I can't evaluate with ethical and accounting issues.
“I owe Apple Programming P400,000 due in 90 days. I know some people at Apple. If I were to sign a note payable and pay them 12 percent interest, they’d let me postpone this debt for a year or more.”“I owe Apple Programming P400,000 due in 90 days. I know some people at Apple. If I were to sign a note payable and pay them 12 percent interest, they’d let me postpone this debt for a year or more.”

What should I do?

If you can not pay your account payable in 90 days, then you should change your account payable into a note payable. There is nothing wrong with this as it is done a lot in the business world. The company you owe wants to get paid preferably sooner, but if not then you will have to pay more later, in the form of interest.