# Spindle Document Management > Knowledge base documentation for Spindle Document Management. ## v1 - [Welcome to Spindle Document Management](https://docs.spindledocumentmanagement.com/docs/welcome-to-spindle-document-management.md) - [System Requirements](https://docs.spindledocumentmanagement.com/docs/requirements.md) - [Where can Spindle Purchase Invoice Recognition be used](https://docs.spindledocumentmanagement.com/docs/where-can-spindle-purchase-invoice-recognition-be-used.md) - [Document Permissions by Company](https://docs.spindledocumentmanagement.com/docs/document-permissions-by-company.md) - [\[Sage 200\] Matching Line Items with different Units of Measure](https://docs.spindledocumentmanagement.com/docs/matching-line-items-with-different-units-of-measure.md) - [Purchase Invoices for customers that are partially VAT exempt](https://docs.spindledocumentmanagement.com/docs/purchase-invoices-for-customers-that-are-partially-vat-exempt.md) - [\[Sage 200\] Configure Nominal Analysis data when using Project Analysis](https://docs.spindledocumentmanagement.com/docs/configure-nominal-analysis-data-when-using-project-analysis.md) - [Accounting System Data Synchronisation Intervals](https://docs.spindledocumentmanagement.com/docs/accounting-system-data-synchronisation-intervals.md) - [Automatic updates for Spindle Purchase Invoice Recognition](https://docs.spindledocumentmanagement.com/docs/automatic-updates-for-spindle-purchase-invoice-recognition.md) - [Send a Purchase Invoice for recognition](https://docs.spindledocumentmanagement.com/docs/send-a-purchase-invoice-for-recognition.md) - [Verify a Purchase Invoice](https://docs.spindledocumentmanagement.com/docs/verify-a-purchase-invoice.md) - [Re-verify Failed, Discrepancy or Rejected Documents](https://docs.spindledocumentmanagement.com/docs/re-verify-failed-or-discrepancy-documents.md) - [Send Email Attachments for recognition](https://docs.spindledocumentmanagement.com/docs/send-email-attachment-for-recognition.md) - [Re-post Purchase Invoices](https://docs.spindledocumentmanagement.com/docs/re-post-purchase-invoices.md) - [Add a Note against a document I am processing](https://docs.spindledocumentmanagement.com/docs/add-a-note-against-a-document.md) - [Export a Purchase Invoice recognition report](https://docs.spindledocumentmanagement.com/docs/export-a-purchase-invoice-recognition-report.md) - [Automatically Load Purchase Order Line Items in Web Verify](https://docs.spindledocumentmanagement.com/docs/automatically-load-purchase-order-line-items-in-web-verify.md) - [Copy text from the Purchase Invoice Document in Web Verify](https://docs.spindledocumentmanagement.com/docs/copy-text-from-the-purchase-invoice-document-in-web-verify.md) - [VAT Analysis for Sage 200](https://docs.spindledocumentmanagement.com/docs/vat-analysis.md) - [Project Analysis for Sage 200](https://docs.spindledocumentmanagement.com/docs/project-analysis.md) - [Supplier not recognised](https://docs.spindledocumentmanagement.com/docs/vendor-number-not-recognised.md) - [Invoice Number not recognised](https://docs.spindledocumentmanagement.com/docs/invoice-number-not-populated-in-verify.md) - [Invoice Date incorrect or not recognised](https://docs.spindledocumentmanagement.com/docs/invoice-date-incorrect-or-blank.md) - [Line Items not recognised](https://docs.spindledocumentmanagement.com/docs/line-item-data-not-recognised.md) - [Purchase Invoice totals are flagged in error](https://docs.spindledocumentmanagement.com/docs/purchase-invoice-totals-are-calculated-incorrectly.md) - [Purchase Order Number not recognised](https://docs.spindledocumentmanagement.com/docs/purchase-order-number-not-recognised.md) - [Company not recognised](https://docs.spindledocumentmanagement.com/docs/company-code-and-name-not-recognised-in-verify.md) - [Purchase Invoice failing to post with Unauthorised Purchase Order error](https://docs.spindledocumentmanagement.com/docs/purchase-invoice-failing-to-post-with-unauthorised-purchase-order-error.md) - [Purchase Invoice goes into Discrepancy for Direct Delivery items](https://docs.spindledocumentmanagement.com/docs/purchase-invoice-going-into-discrepancy-status-for-direct-delivery-line-items.md) - [Purchase Invoice failing to post as Supplier is On Hold](https://docs.spindledocumentmanagement.com/docs/purchase-invoice-failing-to-post-with-unauthorised-purchase-order-error-1.md) - [Purchase Invoice failing to post due to no Goods Received (GRN)](https://docs.spindledocumentmanagement.com/docs/purchase-invoice-failing-to-post-due-to-no-goods-received.md) - [Purchase Invoice going into Discrepancy status](https://docs.spindledocumentmanagement.com/docs/purchase-invoice-going-into-discrepancy-status.md) - [Sign into Spindle Approvals](https://docs.spindledocumentmanagement.com/docs/how-to-sign-into-spindle-approvals.md) - [Setup Workflow rules for Approvers](https://docs.spindledocumentmanagement.com/docs/setup-workflow-rules-for-approvers.md)