Do you suggest to write a letter before I start the dialogue with him.

@Tyler Caglia my 1-4 unit properties are personally owned in my name, with $500K liability on each and a $4M umbrella covering everything.My mixed use is in an S-Corp/INC because I also operated the business My 5-8 unit buildings are in single member and multi member LLCs with $2M liability each

Oh, and about recent deposits- depends on the bank, but if they pick up on the big deposit you can get a letter from your parents saying it was a gift to pay towards the house (which sounds like the truth in your situation if they’re not requiring payment).

Sadly, I think that's largely compliant with the letter of the law regarding the CARE act.  

I am looking for a sample letter from landlord to tenant. 

The engineer supplied a letter saying that it met the standards for repair (liability at that point was on him).

Here is the verbiage of the current NY State  bill:  https://www.nysenate.gov/legislation/bills/2019/s8125and, most offensively,  HERE is the website of a movement to "CANCEL RENTS"   https://www.housingjusticeforall.org/faq-what-to-do-on-april-1Below is the letter we sent to NY state Governor Cuomo. plus MY State Senator, plus the Senator who drafted this bill, and all NYC Housing Depts and officials. 

Follow your CPA's rules to the letter.

Your account mix is worth about 10% of your overall credit score.

My partner and I are in the negotiation stage of a mixed use commercial building.