Anthony,You would be surprised by using some old school methods like simply writing a letter like you mentioned. 

Find Brandon's videos on YouTube for the "four square" method of analyzing homes and practice.

Having them deposit the funds in your account each month is the only other viable method IMO.

I use their payment method and they deposit into my account and it's very simple.

It will co-exist with other "new" payment methods such as google pay, apple pay and credit card etc, because the target customers are different.

Find Brandon's videos on YouTube for the "four square" method of analyzing homes and practice.

@Bob Asad I like the individual sub account method escrow account, but there are multiple different ways to hold security deposits and multiple laws in different states.

These methods include:Detailed Engineering Cost ApproachDetailed Engineering Cost Estimate ApproachSurvey or Letter ApproachResidual Estimation ApproachSampling or Modeling ApproachExperience or “Rule of Thumb” ApproachFor further details on the methodologies, refer here.WHAT ARE THE BEST AND WORST PROPERTIES FOR COST SEGREGATION STUDIES?

Find Brandon's videos on YouTube for the "four square" method of analyzing homes and practice.

Find Brandon's videos on YouTube for the "four square" method of analyzing homes and practice.