How to Retrieve Post ID of another page

I think this can ve achieved using hidden fields if the single post form

Add a field like this in your form

<form>

YOUR CODE GOES HERE
-------------------

<input type="hidden" name="mypostid" value="<?php get_the_id(); ?>" />
</form>

And the page where this form is posting the data you can get the data for the field mypostid

I hope this should solve the problem

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