Encrypt Invoices and Vendor Documents That Contain Banking Details Before Sending
Invoices and remittance advices sent by email often contain vendor bank account numbers, routing details, and tax IDs — exactly the data targeted in business email compromise attacks. Deliteful's PDF Protect tool encrypts these documents with a password before they leave your AP team's outbox.
Business email compromise (BEC) attacks frequently target AP and AR workflows — intercepting invoices to redirect payments, harvesting banking credentials from remittance advices, or impersonating vendors using data from unprotected documents. The FBI's IC3 reported over $2.9 billion in BEC losses in 2023 alone. Password-encrypting invoices and payment documents before emailing them to vendors or clients removes the most accessible attack vector: the unprotected PDF attachment sitting in a compromised inbox.
Deliteful adds file-level encryption to your existing AP send workflow without requiring new software or IT involvement. Upload the invoice or remittance PDF, set a password, and download the encrypted version. One credit per file. Share the password with your vendor contact by phone on first send; many AP teams establish a standing password per vendor for recurring invoices, making the process frictionless at scale. The encrypted PDF is fully readable once unlocked — line items, payment terms, and banking details all intact.
How it works
- 1
Export the invoice or remittance PDF
Generate the final PDF from your accounting system — QuickBooks, NetSuite, SAP, or whatever platform you use.
- 2
Upload to Deliteful and set a password
Use a vendor-specific password established on first contact, or a document-specific password for one-off transactions.
- 3
Download the encrypted invoice PDF
The protected file is ready immediately — replace the unencrypted attachment in your outbound email.
- 4
Confirm the password with the vendor
Call or text the vendor contact to provide the password — this step also serves as a verbal payment confirmation control.
Frequently asked questions
- Why should AP teams encrypt invoices if they're already using secure email?
- Secure email (TLS) encrypts the transmission channel but not the attachment itself. Once delivered, the PDF sits in the recipient's inbox as a readable file — accessible to anyone who gains access to that inbox through phishing, credential theft, or forwarding. File-level encryption means the PDF is unreadable even if the inbox is compromised.
- Can I establish a standing password with a vendor for all recurring invoices?
- Yes, and this is the recommended practice for high-frequency vendor relationships. Establish a shared password with the vendor AP contact on first send, confirmed by phone. Use it consistently for all subsequent invoice and remittance transmissions. Change it annually or after any suspected security event.
- Does encrypting an invoice PDF affect the recipient's ability to process it in their AP system?
- The recipient will need to open and decrypt the PDF before uploading it to their AP system. This is a one-time step per document — they enter the password, open the file, and proceed normally. Most modern AP automation platforms accept PDF uploads from locally decrypted files.
- Is this relevant for purchase orders and vendor statements in addition to invoices?
- Yes. Any document containing banking credentials, vendor tax IDs, or payment terms warrants the same protection. Purchase orders with pricing that constitutes a competitive secret, vendor statements with account balances, and remittance advices with routing numbers are all appropriate candidates for encryption before transmission.
Sign up for a free Deliteful account with Google and start encrypting outbound invoices and AP documents before your next payment run.