> ## Knowledge Base Index > Fetch the complete knowledge base index at: https://support.contracthero.com/sitemap.xml > Use this file to discover available pages before exploring further. > Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash). # How do I add documents to an existing contract? *The screenshots in this article show the German interface. The English label is given first, with the German label in brackets.* You've created a contract in ContractHero and want to file further material against it afterwards — amendments, invoices, correspondence? The Documents area lets you add extra files in seconds, without re-uploading the contract. Any number of files can sit on **one** contract record. ## What's in it for you Contract-related paperwork scatters fast across inboxes, SharePoint and local folders. Anyone looking for a particular file later has to search several tools. The Documents area bundles everything in one place — visible to everyone with permission, searchable via OCR, and always attached to the main contract. It also keeps your contract list readable: **one contract = one row**, even when three documents hang off it. That saves time in audits, handovers and renewals. ## Before you start * You need at least **write access** to the contract category — read access is not enough to upload. * The files you want to upload must be available on your computer or a connected storage location. ## How it works **1. Open the contract overview** and click the contract you want. ![](https://storage.crisp.chat/users/helpdesk/website/-/1/2/5/2/12522a019f980500/vertragsubersicht_1vfsqiy.png) ![](https://storage.crisp.chat/users/helpdesk/website/-/1/2/5/2/12522a019f980500/vertrag-offnen_lgfgz2.png) **2. Switch to the "Documents" tab** („Dokumente") in the right-hand sidebar. It is selected by default when you open a contract. The **"All documents"** („Alle Dokumente") breadcrumb above the PDF takes you to the list of every document on this contract. ![](https://storage.crisp.chat/users/helpdesk/website/-/1/2/5/2/12522a019f980500/dokumentenbereich-offnen_1yq28wj.png) **3. Click the plus icon "Add document"** („Dokument hinzufügen") to the right of the document list. ![](https://storage.crisp.chat/users/helpdesk/website/-/1/2/5/2/12522a019f980500/dokument-hinzufugen_1xcehfb.png) **4. Pick the files** — by drag and drop or through the file browser. If your document uses a non-Latin script (Cyrillic, Chinese, Arabic), choose the matching text-recognition language at the top of the dialog. ![](https://storage.crisp.chat/users/helpdesk/website/-/1/2/5/2/12522a019f980500/upload-fenster_1r8t9c5.png) ![](https://storage.crisp.chat/users/helpdesk/website/-/1/2/5/2/12522a019f980500/hier-document-reinziehen_19vpuly.png) **5. Confirm with "Import"** („Importieren"). The file is attached to the contract immediately and appears in the document list. ![](https://storage.crisp.chat/users/helpdesk/website/-/1/2/5/2/12522a019f980500/hinzugefugtes-dokument_2jab8g.png) ## Document or attachment — what's the difference? This is the decision people get wrong most often, so here it is spelled out: * **Documents** belong to the **same contract record**. They share the contract's category, fields, master data and permissions. Right for supporting material: correspondence, invoices, notes, signed scans. * An **attachment (sub-contract)** is a **separate contract record** with its own fields, its own term and its own notice period, linked to the main contract. Right when the content is a contract in its own right — a renewal, a side agreement, separate terms. Rule of thumb: if the attachment needs **its own dates or data fields**, create it as an [attachment](https://support.contracthero.com/en-us/article/how-do-i-link-attachments-to-a-contract-18km8im/). Otherwise it belongs in the Documents area. Links are managed in the **"Linked"** („Verknüpft") tab on the contract. ## Common questions ### Which file types can I upload? PDF, Word, Excel, images and PowerPoint. Up to 50 files per upload, 256 MB in total. The Documents area is in fact the only place in ContractHero where you can upload **non-PDF** files. ### Does the AI read uploaded documents? Yes — but not in the same way as the main document. Two things to separate: * **A document does not get its own record** with its own AI-extracted fields. Fields always sit on the contract, not on the individual file. * **The content is still evaluated.** Every document is made searchable via OCR, and when an [AI re-analysis](https://support.contracthero.com/en-us/article/ai-retrigger-re-analyze-contracts-and-fill-in-missing-fields-1jjc7t6/) runs, the AI searches the contract PDFs **and every attached document** for values to fill empty fields. In practice: if the information you need only appears in a document you added later, a re-analysis can still pull it into the contract field. If the attachment should have **its own** dates and fields, create it as an attachment instead. ### Can I upload several files at once? Yes. Drag several files into the upload window at the same time, or multi-select them in the file browser. ### Is there a limit per contract? Technically a contract can hold a great many documents. From around **20 attachments** onwards, though, it's worth asking whether a [contract hierarchy](https://support.contracthero.com/en-us/article/how-do-i-set-up-contract-hierarchies-1v4gkp5/) with sub-contracts would be the cleaner structure. ### Who can add documents? Members with **write access** or **full access** to the contract category. Plain **read access** is not enough to upload. ### Who can see the documents I add? Visibility follows the contract: anyone who can't see the contract can't see the documents attached to it either. There is no separate per-document sharing. ## Good to know * **Descriptive file names save searching later.** "Order_confirmation_2026-03_v2.pdf" is findable, "Document3.pdf" is not. Name the file before you upload it. * **Everything lands in the activity log.** Uploads, deletions and previews are recorded in the **"Activity"** („Aktivität") tab with the person and a timestamp — useful when an audit asks who attached what and when. * **Upload date and uploader are in the list.** For every file, the document list shows when it was added and by whom. * **Non-Latin scripts need the right language.** For Cyrillic, Chinese or Arabic, switch the text-recognition language in the upload dialog — it can't be changed afterwards. ## Related articles * [How do I link attachments to a contract?](https://support.contracthero.com/en-us/article/how-do-i-link-attachments-to-a-contract-18km8im/) — when the attachment should carry its own contract data * [Reassigning a contract attachment to a master contract](https://support.contracthero.com/en-us/article/reassigning-a-contract-attachment-to-a-master-contract-1nuwta2/) * [How do I set up contract hierarchies?](https://support.contracthero.com/en-us/article/how-do-i-set-up-contract-hierarchies-1v4gkp5/) * [AI Retrigger: Re-analyze contracts and fill in missing fields](https://support.contracthero.com/en-us/article/ai-retrigger-re-analyze-contracts-and-fill-in-missing-fields-1jjc7t6/) — the AI reads attached documents too