--- title: "Failure message: Invalid address" description: Here are the reasons you might be receiving this error: --- [Skip to content](https://support.postworks.co.uk/knowledge/failure-message-invalid-address#main-content) ![Logo (transparent background, red emblem, red text, tagline NOT included) (PRIVATE).png\]](https://support.postworks.co.uk/hs-fs/hubfs/Logo%20(transparent%20background%2c%20red%20emblem%2c%20red%20text%2c%20tagline%20NOT%20included)%20(PRIVATE).png?height=40&name=Logo%20(transparent%20background%2c%20red%20emblem%2c%20red%20text%2c%20tagline%20NOT%20included)%20(PRIVATE).png) Open main navigation Close main navigation - [Postworks Portal](https://app.postworks.co.uk/dashboard/send) [Postworks Portal](https://app.postworks.co.uk/dashboard/send) Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Support Centre](https://support.postworks.co.uk/knowledge?hsLang=en) 2. 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[Troubleshooting](https://support.postworks.co.uk/knowledge/troubleshooting?hsLang=en#troubleshooting) # Failure message: Invalid address ## Here are the reasons you might be receiving this error: ### **The page is not A4 format (297 x 210 mm)** Here's how to fix this using Adobe Acrobat**:** 1. ***Open your PDF*:** Open the PDF file you want to modify with Adobe Acrobat. 2. ***Access Print Settings*:** Go to File \> Print or press Ctrl+P (Windows) or Cmd+P (Mac). 3. ***Choose Microsoft Print to PDF*:** In the printer dropdown, select Microsoft Print to PDF 4. ***Click on Properties and then Advanced...*:** Click on 'Properties' and in the new window that opens click the 'Advanced...' button 5. ***Select A4*:** In the Paper/Output dialog, find the paper size dropdown and select A4. 6. ***Confirm and Print*:** Click OK in the Page Setup dialog, then click Print in the main print dialog. Choose a location to save your resized PDF. ### **The address is not in the watchzone** Here is the zone where the address must be (barring a custom set watchzone via a workflow): ![Screenshot 2025-08-01 120831](https://support.postworks.co.uk/hs-fs/hubfs/Screenshot%202025-08-01%20120831.png?width=680&height=946&name=Screenshot%202025-08-01%20120831.png)   ### **The text in your PDF is not selectable/readable** If you're unable to select or copy text from your PDF, it usually means the PDF was created as an image-based file rather than text-based. This happens most often when scanning physical documents into PDFs or saving documents incorrectly. **What to do:** 1. Ensure your original document contains selectable text (not just an image). 2. Save your file as a text-based PDF: - From Microsoft Word, click **File**, then choose **Save As**. - Select **PDF** from the file format options and ensure it's set to retain text formatting. 3. If scanning, use OCR (Optical Character Recognition) software to convert image-based PDFs into selectable text. **Note:** PDFs uploaded to Postworks must contain selectable text to process your mail properly.   ### Your address is fewer than 3 lines Addresses must have at least 3 lines. For Postworks to process and deliver your mail correctly, each address must include at least three lines of text. This helps our systems verify addresses quickly and ensures accurate delivery. **What to do:** 1. Check the address you're trying to use. 2. Make sure it includes at least: - Recipient name or company name - Street address or PO Box - Town or city, postcode (and country if sending internationally) 3. 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