The Response Promotion Redemption plugin allows you to create partner promotions with list of your promotion codes and your partners.

Noted That:

To install correctly this response-promotion-redeemer.zip.
Fisrt Download the response-promotion-redeemer.zip to your computer
Extract/Open response-promotion-redeemer.zip to Your Computer.
Then, Find readme.txt file inside response-promotion-redeemer.zip and Open readme.txt.
Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
Then, Follow the the Tips Below.

Start the Tips:

1. First Download "response-promotion-redeemer.zip" Plugin to your Local Computer. (Click Download)

2. Then, Login to your "yourdomain.com/wp-admin" Dashboard.

3. Then, Click on "Plugins" + "Add New" from left sidemenu of Dashboard.

4. Now, Click on "Upload Plugin" button.

5. Now, Browse "response-promotion-redeemer.zip" Downloaded plugin from your computer, Where you downloaded response-promotion-redeemer.zip According to Step – 1 Above then, click on "Install Now"

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "Response Promo Redeemer" folder is added on left sidemenu. Now, Click on "Response Promo Redeemer" folder.

Noted that: If you do not see "Response Promo Redeemer" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

8. Now you configure yourself oR Watch video tutorial below about Response Promo Redeemer Configurtions and Settings or How to work "Response Promo Redeemer" in your WordPress site.

After Activated Plugin According to Step-6 then,

Go to "Plugins" + "Installed Plugin" from Wordpress Admin Panel Leftside Menu.
or Direct go to: https://yourdomain/wp-admin/plugins.php
Then, Find "Response Promo Redeemer" Activated Plugin from Plugin List.
Then, Click on "Settings" from Plugin that is Response Promo Redeemer
Now, Edit/Add/Config the setting and Click on "Save Changes" button,

Guide

Guide
Upload `response-promotion-redeemer` folder to the `/wp-content/plugins/` directory Activate the plugin through the ‘Plugins’ menu in WordPress Form short-code: [promo-form] attr 1 = start_message=”This is the message to be used in the beginig of your email” attr 2 = end_message=”This is the message to be used in the end of your email and confirmation display message on the front end to users” adding “” in either attribute will create a paragraph break in you plaintext email adding “ ” in either attribute will create a line break in you plaintext email

Upload response-promotion-redeemer folder to the /wp-content/plugins/ directory
Activate the plugin through the ‘Plugins’ menu in WordPress

Form short-code:

[promo-form]
attr 1 = start_message=”This is the message to be used in the beginig of your email”
attr 2 = end_message=”This is the message to be used in the end of your email and confirmation display message on the front end to users”

adding “” in either attribute will create a paragraph break in you plaintext email
adding “
” in either attribute will create a line break in you plaintext email

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Reffered: https://wordpress.org/