That way, I know I'm mailing to a bona fide note holder.

The 90 day notice cannot be given until the seller has a bona fide offer from a buyer who intends to occupy the property. 

Back it up with a REAL doctor's diagnosis of the problem (nobody less than a bona fide MD) that your daughter is suffering and why.

Do you have a bona fide lease agreement with the former owner?

So what you want to do is create a bona fide loan under 166 in case it becomes a bad debt loss you can take as a short-term capital loss in the year it becomes worthless.Depending on the amount you may want to make sure that you have evidence of attempt to enforce the obligation on lapse of payment.You want things like:Evidence of indebtedness (written or printed)Interest rate consistent with risk-profileCollateralPayment ScheduleHistory of PaymentEnforcement efforts evidence on non paymentAbility to lend and repayConsistent treatment across tax formsRemove any evidence of there being payment subject to conditions.

While I thought this was my trial start, it was not, but at least this time, serious progress was made and serious statements by the judge were made.In a nut shell, she stated that her position was that I am a bona fide purchaser and that there was no legal marriage.

I found this article published by Nomad Capitalist that was very helpful:PUERTO RICO TAX INCENTIVES: THE ULTIMATE GUIDE TO ACT 20 AND ACT 22There are many requirements that need to be met in order to benefit from these tax incentives but it seems that the one that people have the hardest time complying with is being a "bona fide resident". 

My understanding was that after a certain number, you have to qualify as a bona fide lender.

A bona fide lease will feature fair market value rate of rent, and usually a record of a security deposit payment. 

There are many references in the various subsections that provide protections to a bona fide purchaser for value.K.