Title: PDF version
Last modified: June 24, 2022

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# PDF version

 *  Resolved [steindegroot](https://wordpress.org/support/users/steindegroot/)
 * (@steindegroot)
 * [3 years, 11 months ago](https://wordpress.org/support/topic/pdf-version-2/)
 * Hello!
 * We have some issues with the invoices in combination with Bol.com (a Dutch mass
   retailer). When we send our customers an automatic e-mail, we get an error from
   that website (see link). The picture from the link says: ‘Your e-mail does not
   conform to the allowed file formats. Only the following file formats are allowed:
   etc…’. Clearly PDF is included here, though we keep getting this error. We have
   been selling on this platform for over 3 years, half a year ago we started to
   receive this error. Did anything major change in an update of some kind?
 * After contacting a help desk of our Bol.com partner, they recommended using PDF
   version 1.4 (acrobat 5.x) instead of PDF version 1.7 (acrobat 8.x). Is there 
   any way to do this? I suppose this is not a standard option in the plug-in. Would
   it also be possible to reduce the size of the PDF, ours is currently 268 kB while
   being completely stripped down. Perhaps this will solve it as well.
 * I look forward to hear from you soon!
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fpdf-version-2%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Contributor [alexmigf](https://wordpress.org/support/users/alexmigf/)
 * (@alexmigf)
 * [3 years, 11 months ago](https://wordpress.org/support/topic/pdf-version-2/#post-15781232)
 * Hi [@steindegroot](https://wordpress.org/support/users/steindegroot/)
 * Sorry for the late reply!
 * Currently the library we use by default, DOMPDF, supports only PDF 1.7, although
   you could try the other supported library mPDF that supports PDF/A, you can download
   it [here](https://github.com/wpovernight/woocommerce-pdf-ips-mpdf/releases/download/v2.4.0/woocommerce-pdf-ips-mpdf.2.4.0.zip).
 * Hope that helps!
 *  Plugin Contributor [Yordan Soares](https://wordpress.org/support/users/yordansoares/)
 * (@yordansoares)
 * [3 years, 11 months ago](https://wordpress.org/support/topic/pdf-version-2/#post-15781974)
 * Hi [@steindegroot](https://wordpress.org/support/users/steindegroot/),
 * In addition to what my colleague said, to reduce the size of the PDF, you can
   try activating the **Enable font subsetting** option, under **WooCommerce > PDF
   Invoices > General**:
 * ![A screenshot that displays the Enable font subsetting checked](https://i0.wp.
   com/i.ibb.co/HNRmRtD/PDF-Invoices-Enable-font-subsetting.png?ssl=1)
 * Also, if you have set a logo for the shop, try to reduce its size to the actual
   output (you may be using a bigger size than the actual output). Finally, if the
   logo is a PNG file, convert it to JPEG instead.
 * ⌊A screenshot that displays a shop logo with recommended size⌉⌊A screenshot that
   displays a shop logo with recommended size⌉
    _The maximum recommended image resolution
   is 600dpi, but most logos can be less than 200dpi._
 * Hope it helps!

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘PDF version’ is closed to new replies.

 * ![](https://ps.w.org/woocommerce-pdf-invoices-packing-slips/assets/icon-256x256.
   png?rev=2189942)
 * [PDF Invoices & Packing Slips for WooCommerce](https://wordpress.org/plugins/woocommerce-pdf-invoices-packing-slips/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/woocommerce-pdf-invoices-packing-slips/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/woocommerce-pdf-invoices-packing-slips/)
 * [Active Topics](https://wordpress.org/support/plugin/woocommerce-pdf-invoices-packing-slips/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/woocommerce-pdf-invoices-packing-slips/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/woocommerce-pdf-invoices-packing-slips/reviews/)

 * 2 replies
 * 3 participants
 * Last reply from: [Yordan Soares](https://wordpress.org/support/users/yordansoares/)
 * Last activity: [3 years, 11 months ago](https://wordpress.org/support/topic/pdf-version-2/#post-15781974)
 * Status: resolved