# Digital Signatures for Parcels > Site directory and reading guidance: [llms.txt](https://wiki.skusavvy.com/llms.txt). Canonical URL: https://wiki.skusavvy.com/article/digital-signatures-for-parcels Published: 2026-11-04T14:08:05.612Z Last updated: 2026-11-04T14:30:19.083Z Category: Technology > This article is AI-assisted reference material. Verify important or time-sensitive claims against the cited sources; AI review does not establish independent factual verification. ## Overview Digital signatures for parcels are electronic records used to document a recipient’s acknowledgment of a parcel handover. In everyday carrier terminology, the phrase often means a handwritten signature captured on a touchscreen. In information security, a **digital signature** has a narrower meaning: a cryptographic value used to verify data integrity and the identity associated with a signing key. The distinction matters in disputes. A captured signature can be part of an electronic proof-of-delivery record without being cryptographically signed. Conversely, a cryptographic signature on a delivery record can help establish that the record has not changed, but does not by itself prove that the intended recipient physically received the parcel. The U.S. [E-SIGN Act definition of an electronic signature](https://www.law.cornell.edu/uscode/text/15/7006) is broader than the [cryptographic digital signature methods defined by NIST](https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-5.pdf). ## Etymology and Origins The word *signature* comes through Latin *signatura*, meaning a marking or sign. Merriam-Webster dates the [first known use of the English word to the 15th century](https://www.merriam-webster.com/dictionary/signature). In parcel operations, terminology shifted from a signature on a paper delivery receipt to an **electronic signature** captured or stored digitally. *Proof of delivery*, often abbreviated POD, describes the broader evidence of a completed handover; a signature is only one possible component. The technical term *digital signature* developed alongside public-key cryptography. [Whitfield Diffie and Martin Hellman’s 1976 paper, “New Directions in Cryptography”](https://ee.stanford.edu/~hellman/publications/24.pdf), described the public-key approach that made electronic authentication and signatures possible. The later [U.S. statutory definition of electronic signature](https://www.law.cornell.edu/uscode/text/15/7006) encompasses electronic sounds, symbols, or processes associated with a record and adopted with intent to sign; it does not require a particular cryptographic technique. A specific first documented use of “digital signatures for parcels” is not established here. ## Historical Development - **Before electronic capture:** Parcel and freight operators commonly relied on paper delivery receipts and handwritten acknowledgments. Paper records required physical transport, filing, and retrieval when a delivery was questioned. - **1970s:** Diffie and Hellman’s [1976 publication](https://ee.stanford.edu/~hellman/publications/24.pdf) helped establish public-key cryptography. In 1978, Ronald Rivest, Adi Shamir, and Leonard Adleman published an [encryption and signature method now known as RSA](https://people.csail.mit.edu/rivest/Rsapaper.pdf). Separately, machine-readable parcel identification expanded as [standardized barcodes](https://www.gs1.org/standards/barcodes) were adopted in retail and logistics; the Universal Product Code was commercially introduced in the United States in the mid-1970s, while GS1’s present standards organization was formed later. - **1990s–2000s:** Handheld computers, barcode scans, and networked tracking systems made it possible to associate delivery events and captured signatures with electronic shipment records. In the United States, the [E-SIGN Act of 2000](https://www.law.cornell.edu/uscode/text/15/7001) established a general rule against denying legal effect to a signature or record solely because it is electronic, subject to statutory conditions and exceptions. - **2010s–2020s:** Mobile connectivity, carrier integrations, and cloud-based records broadened access to delivery evidence. The European Union’s [eIDAS Regulation](https://eur-lex.europa.eu/eli/reg/2014/910/oj), adopted in 2014, established a framework for electronic identification and trust services, including electronic, advanced electronic, and qualified electronic signatures. NIST published [FIPS 186-5](https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-5.pdf) on February 3, 2023, specifying approved cryptographic digital signature algorithms and withdrawing earlier versions of FIPS 186. These developments did not make every parcel signature a cryptographic signature. Many delivery workflows still use an electronic mark linked to a tracking event rather than a recipient-held signing key. Major carriers continue to sell signature services as operational delivery options, not as qualified electronic signatures. FedEx and UPS each publish [recipient and signature options](https://www.fedex.com/en-us/delivery-options/signature-services.html) with different levels of assurance. ## Core Concepts and Workflow A typical signature-required delivery follows these steps: 1. **Identify the shipment.** The driver scans a parcel barcode or selects the shipment on a device. The identifier links the handover event to the carrier’s tracking record; [barcode standards](https://www.gs1.org/standards/barcodes) support machine-readable identification. 2. **Check the delivery conditions.** The driver follows the applicable service instructions, which may require a signature, an adult recipient, or another prescribed check. Requirements vary by carrier, service, destination, and shipment. 3. **Capture acknowledgment.** The recipient may sign a touchscreen, or the carrier may use an alternative authorized process. The record can include the signature image, signer name or role, event time, location, and delivery status. 4. **Transmit and retain evidence.** The device synchronizes the event with the carrier’s system. A shipper may retrieve relevant information through a portal or integration and associate it with the order. [Order-management systems](https://www.skusavvy.com/order-management-system) provide order records that can serve as a reference point for such reconciliation; availability of delivery evidence depends on the carrier and integration. For a cryptographically signed record, software generally creates a digest of the record and signs it with a private key. A verifier uses the corresponding public key to check the signature under an approved algorithm, as described in [FIPS 186-5](https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-5.pdf). The organization must also establish whose key was used, protect that key, and preserve the signed data. A carrier’s system signature is not necessarily the recipient’s personal cryptographic signature. ## Types of Delivery Evidence **Captured handwritten signature.** A recipient draws a mark on a handheld device. The resulting image is useful evidence of acknowledgment but may be difficult to identify without supporting information. **Name or other electronic acknowledgment.** A typed name or recorded confirmation may form part of a delivery record. Whether it has the legal effect of a signature depends on intent, context, applicable law, and evidence—not merely on the presence of text. The [E-SIGN Act’s definition](https://www.law.cornell.edu/uscode/text/15/7006) covers several forms of electronic signing. **Cryptographically signed record.** A system signs a delivery record to support integrity verification and attribution to a signing key. This protects a different evidentiary question from whether the correct person accepted the parcel; the technical requirements are addressed by standards such as [FIPS 186-5](https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-5.pdf). **Alternative proof of delivery.** A delivery event may instead include a photograph, scan, location, access-code confirmation, or other evidence. These do not automatically satisfy a signature-required service. Shippers should verify the carrier’s actual service terms before relying on any substitute. UPS, for example, distinguishes [signature required, adult signature required, and delivery confirmation](https://www.ups.com/us/en/support/shipping-support/shipping-services/signature-options) as separate services. ## Applications and Operating Considerations Signature capture is useful where the shipper needs stronger evidence of handover, such as deliveries of valuable goods, business-to-business shipments received at a loading dock, or parcels requiring a named or age-verified recipient. A signature can indicate that *someone* acknowledged delivery; additional controls are needed when the service requires a particular person or an identity check. For example, a merchant sending an expensive device can select an appropriate carrier service, retain the shipment identifier, and reconcile the resulting delivery event with the original order. FedEx describes [signature options with different recipient requirements](https://www.fedex.com/en-us/delivery-options/signature-services.html), illustrating why the shipper must check the selected service rather than assume all signatures provide the same assurance. A [shipping and fulfillment system](https://www.skusavvy.com/shipping-and-fulfillment-software) can support the earlier shipment workflow, while carrier-specific capabilities determine what signature evidence can be requested or retrieved. For a multi-parcel order, operators should reconcile evidence at the parcel level rather than assume one signature covers every box; [multi-box shipping workflows](https://www.skusavvy.com/docs/guides/shipping/multi-box) distinguish shipments containing multiple boxes. The principal trade-offs are delivery speed and convenience versus evidentiary value. A signature requirement can produce failed delivery attempts when no eligible person is available. A signature image may also be illegible, captured against the wrong tracking number, or associated with a recipient who was not authorized to accept the goods. Conversely, a photograph or location event may support a delivery investigation without identifying the person who received the parcel. ## Legal, Security, and Best Practices Electronic signatures are not universally interchangeable. In the United States, [E-SIGN’s general rule](https://www.law.cornell.edu/uscode/text/15/7001) concerns legal effect and enforceability, subject to conditions and exceptions. In the European Union, [eIDAS](https://eur-lex.europa.eu/eli/reg/2014/910/oj) distinguishes electronic, advanced electronic, and qualified electronic signatures; an ordinary signature drawn on a courier’s device should not automatically be treated as a qualified electronic signature. Local law, contract terms, and the nature of the transaction remain relevant. Recommended controls include: - **Match the service to the risk.** Specify whether any recipient, an adult, or a particular person must accept the parcel, and confirm what the carrier actually offers. Compare requirements with the carrier’s [published signature options](https://www.fedex.com/en-us/delivery-options/signature-services.html). - **Preserve context.** Retain the tracking number, order reference, service level, event timestamps, signer information where collected, and any applicable exception or redelivery history. Record the source and retrieval time of evidence to help investigators assess it later. - **Protect records.** Restrict access, encrypt data in transit and storage, maintain audit logs, and define retention and deletion periods appropriate to contracts and law. Protect any cryptographic signing keys separately from ordinary delivery data. - **Test integrations and exceptions.** Check offline synchronization, duplicate events, missing signatures, returns, and partial deliveries. An [integration layer](https://www.skusavvy.com/integrations) may connect fulfillment systems to external services, but the evidence fields available must be verified for each carrier and connection. Flag a delivered status with missing required evidence for investigation rather than treating it as a completed signature capture. - **Measure outcomes.** Track signature-capture completeness, failed first attempts, delivery disputes, and retrieval time. Compare these measures with the cost and customer impact of signature-required services. Define the completeness rate as parcels with required evidence available divided by parcels requiring signature, and investigate failures by carrier and service. Delivery records can contain personal information, including names, signatures, and location data. Organizations should collect only what they need, control access, and apply relevant privacy requirements. Where applicable, the EU [GDPR’s data-minimization and storage-limitation principles](https://eur-lex.europa.eu/eli/reg/2016/679/oj) are relevant to these decisions. A well-preserved record supports an investigation, but no single signature image guarantees identity, authorization, or receipt of the correct contents. ## Source links - [15 U.S.C. § 7006 — Definitions]() - [FIPS 186-5: Digital Signature Standard]() - [New Directions in Cryptography]() - [GS1 Barcodes]() - [15 U.S.C. § 7001 — General Rule of Validity]() - [Regulation (EU) No 910/2014 on Electronic Identification and Trust Services]() - [SkuSavvy Order Management System]() - [SkuSavvy Shipping and Fulfillment Software]() - [SkuSavvy Multi-Box Shipping]() - [SkuSavvy Integrations]() - [Signature: Definition and Meaning]() - [A Method for Obtaining Digital Signatures and Public-Key Cryptosystems]() - [FedEx Delivery Signature Options]() - [Regulation (EU) 2016/679: General Data Protection Regulation]() - [UPS Signature Options]()