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Postal USPS Facing Identification Mark

FIM Barcode Generator (USPS Facing Identification Mark)

Generate USPS Facing Identification Mark (FIM A-E) barcodes for business reply mail and automated post sorting.

Live Generator
22/500

Completes check digits when their position is clear. Use parenthesized AIs for GS1. Existing check digits are validated. Other formats keep their usual behavior.

FG
BG
🛡️Zero Data Retention: Encoded in edge memory. Never logged or stored.

Technical Specifications

Structure Special Formats (USPS Facing Identification Mark)
Capacity Single letter pattern (A, B, C, D, E) marking envelope orientation for automated cancellation
Character Set Pattern letters A to E
Quiet Zone Requirement auto modules (Special Formats)

Common Applications

This standard is widely used in the following industries:

Special Formats utilized across retail, logistics, manufacturing, and global supply chains.
Input Constraints & Parity: The xBarcode Rust engine enforces strict input boundary and character set conformance. Internal parity and standard check symbols are handled automatically to prevent defective symbols in production.
Developer Quickstart

Automate FIM via API

Full API Reference → 
curl -X POST https://api.xbarcode.ai/v1/render \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_TOKEN" \
  -d '{
  "format": "fim",
  "content": "A"
}' > barcode.svg
API outputs: SVG, PDF, EPS and matrix JSON. PNG is exported in the browser. < 20ms Edge latency
Related Standards

Alternative Symbologies related to FIM

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