Security deposit amountYou can find plenty of examples by searching for "tenant estoppel certificate doc" or exchanging "doc" with "pdf" for more options.Here is an example and explanation: Sample EstoppelSome have a lot of legal jargon but this document does not need to be so detailed.

You also haven't shared what attempts you've made to reach out to them for an explanation... 

I have investments that send on-time quarterly reports with documents like rent rolls, expense reports, detailed explanations of whether we are in line with initial projections or not and if things have been improving or not and why.

When you raise the rent the tenant may request an explanation and it’s very easy to explain that in order to continue to service them and respond to their requests you need to charge them more. if your average rent is $1,000 per unit and the average tenant calls 2 times per year why is it fair to the good tenants that this troublesome tenant to call 50+ times per year and pay the same rate? 

@Charles Baker Bryan gave a great explanation.

RandyThank you for such a thorough explanation Randy!  

Applicability of the tax or legal principles discussed in this material may differ substantially in individual situations.Thank you very much for the comprehensive explanation of the tax related details and the advice for Drew Sygit.

Thanks for the explanation.

They have reviews, screenshots, explanation videos, reviews, etc.Example: https://www.etsy.com/search?

The explanation is fine, but the info is dated and non applicable for today.