Wufoo: Your submission is missing the secure POST key

Question

There was a problem with your submission.

Your submission is missing the secure POST key.

when I am redirected on Wufoo then got the warning or error

I have attached screenshot related error

HTML

    <form name="Wufoo Button" accept-charset="UTF-8"
                enctype="multipart/form-data" method="post"
action="https://subdomainname.wufoo.com/forms/sponsorchild/">
                <!-- Dollars -->
                <input id="Field127" name="Field127" type="hidden" t-att-value="Field127" />
                <!-- Cents  -->
                <input id="Field127-1" name="Field127-1" type="hidden" t-att-value="Field1271" />
                <!-- Child name and file number -->
                <input id="Field125" name="Field125" type="hidden" t-att-value="Field125" />
                <input id="saveForm" name="saveForm" class="submit" type="submit" value="Submit" />
            </form>

Answer 1

Not sure if you're still stuck on this but I found the answer.

You need to keep this bit of HTML at the end of the form (you can just hide it with css). The value acts as the key:

<li class="hide">
<label for="comment">Do Not Fill This Out</label>
<textarea name="comment" id="comment" rows="1" cols="1"></textarea>
<input type="hidden" id="idstamp" name="idstamp" value="[WUFOO VALUE IS HERE]" />
</li>