Bar Admission Number (Attorney) Regex for Go

What this pattern does

This page provides a lightweight, single-purpose regular expression for matching bar admission number (attorney), ported and verified for Go. Identity and credential patterns need both correctness and safety, since they're frequent targets for adversarial input. The snippet below is ready to drop into your Go project — whether you're validating in a Gin handler, a gRPC service, or a command-line tool.

Go Implementation

// Bar Admission Number (Attorney)
// ReDoS-safe | RegexVault — Identity & PII > Professional Identity

package validation

import "regexp"

var barAdmissionNumberAttorneyRe = regexp.MustCompile(`^[0-9A-Z]{4,10}$`)

func ValidateBarAdmissionNumberAttorney(s string) bool {
    return barAdmissionNumberAttorneyRe.MatchString(s)
}

// Example
// fmt.Println(ValidateBarAdmissionNumberAttorney("12345")) // true

Test Cases

When to use this pattern

This pattern is drawn from the Identity & PII > Professional Identity category and carries a ReDoS-safe certification. That matters for Go developers because Go's RE2 engine is inherently safe from catastrophic backtracking, but this pattern has been additionally verified for correctness. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

Bar admission numbers (State Bar ID) vary by state: California uses 6 digits (100000-999999), New York uses 7 digits, Texas uses alphanumeric. The State Bar of each state maintains the public database of admitted attorneys.