How to prove a party received a specific letter?
<p>I signed up for a membership service with an HVAC company some time ago, and I've now decided its time to cancel my membership due to lack of use.</p>

<p>There isn't a nearby customer center where I live, so I attempted to cancel the membership a few times by phone. I soon caught on that the company doesn't intend to cancel my membership before I am automatically billed for another year of service; every phone call typically devolves into a high-pressure sales pitch for me to stay, or they hang up on me after I get put on hold.</p>

<p>Furthermore, I signed up accidentally for the membership -- having not read the fine print of the installation contract for my new HVAC -- so I am now worried that a verbal confirmation of cancellation over the phone will not be honored.</p>

<p>In the contract I signed, the following text appears:</p>

<blockquote>
  <p>I hereby authorize FooBar herein after called Company, to initiate debit entries to my account. This authorization is to remain in full force until Company received written notification from me of its termination in such time and in such manner as to afford Company a reason able opportunity to act on it (30 days).</p>
</blockquote>

<p>I want to be safe and send a written notification from me requesting termination of my membership. However, I am afraid of the company claiming to have never received my written notification. I could send the written notification through certified mail, but that would only prove that the company received a letter from me and prove nothing of the contents within.</p>

<p><strong>How do I prove the contents of the letter I sent is actually the contents of the letter a party received?</strong></p>

<p>It's true that you can't prove what was in the envelope. But assuming this ends in small claims court or some sort of collections action lets play out how it works.</p>
<p>The company is going to claim that they never got notice of cancellation. They will plead ignorance so they won't have any evidence of what you didn't send. That's obvious, but more on this later.</p>
<p>You are going to have a trove of evidence. The emails you sent, the webforms you filled out, the voicemails you left. And finally, the letters that you sent.</p>
<p>Let's think about the weight of evidence! At the very least you can ask them, if they claim they didn't get a cancellation from you, what <strong>did</strong> they get in that certified envelope from you? They'll need to produce whatever was in the envelope. Unless they claim that it was empty.</p>
<p>At this point the judge will see exactly what is going on and <strong>you won't need to prove what was in the envelope</strong>.</p>
<p>Legally, the way this works is covered by <a href="https://www.law.cornell.edu/rules/fre/rule_901" rel="noreferrer">Rule 901</a>.</p>
<blockquote>
<p><strong>(a) In General</strong>. To satisfy the requirement of authenticating or identifying
an item of evidence, the proponent must produce evidence sufficient to
support a finding that the item is what the proponent claims it is.</p>
<p><strong>(b) Examples</strong>. The following are examples only — not a complete list —
of evidence that satisfies the requirement</p>
<p><strong>(1) Testimony of a Witness with Knowledge</strong>. Testimony that an item is
what it is claimed to be.</p>
</blockquote>
<p>It's that last piece that matters here. You will take the stand and testify that the letter you brought to court is a true copy of the letter in the envelope.</p>

<p>A common practice for law firms is to make a photocopy of correspondence issued, and to send it by multiple channels. </p>

<p>For instance, you may scan and email it to a customer service email address as well.</p>

<p>If you still own a fax (or can find one), and you can find a fax number for the company (which is still surprisingly common), you can fax it to them as well, and get a transmission receipt which can include an image of the fax you sent, and a timestamp.</p>

<p>The more serious the matter, the more means you can use to send it. The more means you use, the more evidence there will be that you have sent it, and they have received it - you'll have the timestamped email, the registered post receipt, the fax transmission receipt - and the more difficult it will be for them to say that, on this particular day, all methods of communication with them <em>just happened to fail</em>.</p>

<p>Finally, should this matter come before a court, you may find it useful to declare an oath or other instrument for making a sworn statement of fact - usually a statutory declaration or an affidavit. Your ability to swear one - and rely on it - will depend on the jurisdiction and other evidence you have in your favour.</p>

<p>I've had the exact same question when dealing on a legal matter with an adversary in California.</p>

<p>Certain statutes in California require written notices to be sent, for example, between landlords and tenants.</p>

<p>The way this works is you post the letter as described in the statute, often even without any sort of extra postal services like a confirmation of receipt or anything like that.  As <em>jimsug</em> mentioned, you could indeed make sure to provide an extra copy in person, by fax or email, in addition to the USPS letter, just in case (but also making sure to explain in any such copy that it is merely a copy of the letter sent via USPS, to avoid any confusion, and to avoid the adversary later claiming that letter was not sent by USPS as possibly required by the statute or contract).</p>

<p><strong><em>IFF</em></strong> this comes down to court, you simply make a declaration under oath that the correspondence was sent as required, showing proof of paid postage (I like getting receipts that show the 9-digit ZIP code of the destination), or possibly the signature of the recipient (if required -- some statutes don't actually require that the letters sent are actually received!), along with any other evidence of the copies being sent as well.  You also show the exact copy of what was sent, and likewise swear under oath that it is a copy of what was sent.</p>

<p>It's not very likely that the adversary will decide to lie under oath to contradict your statement, and even if they do, you'll have an adequate time for cross examination of them as a witness.</p>

<p>Utilize a disinterested third-party for mailing purposes  who will sign an affidavit swearing as to an itemized list of the contents mailed (with scanned copies of the items attached as exhibits). Simple.</p>

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