# E-Signature Tool > Draw your signature on a digital canvas and download it as a high-quality transparent PNG. **Category:** Media **Keywords:** sign, signature, esign, contract, draw, handwriting, image, png, transparent, legal, digital signature, electronic sign, paperless, fill and sign, touch signature **URL:** https://complete.tools/e-sign ## How it works The tool processes inputs by allowing users to upload a document and select a location for their signature. Once the user places their signature, the system generates a unique digital signature hash, which is a fixed-length representation of the document's contents. This hash is then encrypted with the user's private key to create a secure signature. The original document, along with the encrypted signature and the public key, is saved or sent to the intended recipient. The recipient can verify the signature by decrypting it with the public key and comparing the generated hash of the received document with the decrypted hash. ## Who should use this 1. Real estate agents preparing contracts for property transactions. 2. Lawyers needing to sign agreements and legal documents remotely. 3. Human resources managers distributing employment contracts for new hires. 4. Freelancers invoicing clients and signing service agreements. 5. Nonprofit organization directors signing grant applications and reports. ## Worked examples Example 1: A lawyer needs to sign a contract. The lawyer uploads a PDF contract of length 5 pages. After positioning the signature, the tool generates a digital signature hash. If the hash of the contract is 'A1B2C3' and the encrypted signature is 'D4E5F6', the document is saved with both details. Example 2: A real estate agent sends a rental agreement. The agreement is 3 pages long, and the agent adds their e-signature. The document hash is computed as 'G7H8I9'. The tool encrypts this hash to produce 'J0K1L2', ensuring the agreement's integrity. Both the document and encrypted signature are sent to the tenant for verification. ## Limitations E Sign has several technical limitations. First, it may not support all document formats, leading to compatibility issues. Second, the precision of signature placement may vary depending on the user's device, potentially affecting document layout. Additionally, if a user loses access to their private key, they cannot verify previous signatures. The tool assumes that users have a stable internet connection for document uploads and downloads, which may not be feasible in all locations. Lastly, while e-signatures are legally binding in many jurisdictions, certain documents, such as wills or court documents, may not be eligible for e-signatures under specific laws. ## FAQs **Q:** How does E Sign ensure the authenticity of a signature? **A:** E Sign uses cryptographic methods to create a unique digital signature that is linked to the document and the signer's identity. This includes generating a hash of the document and encrypting it with the signer’s private key. **Q:** Can E Sign be used for international documents? **A:** Yes, E Sign can be used for international documents, but users must ensure compliance with local electronic signature laws, which may vary by jurisdiction. **Q:** What happens if a document is altered after signing? **A:** If a document is altered after signing, the hash generated during the signing process will not match the hash of the altered document, indicating that the signature is no longer valid. **Q:** Are there any specific types of documents that are not eligible for e-signatures? **A:** Yes, documents such as wills, certain court documents, and notices of default may not be eligible for e-signatures, depending on the governing laws in specific jurisdictions. --- *Generated from [complete.tools/e-sign](https://complete.tools/e-sign)*