import type { PatternRule } from '../types.js';
/**
 * VAT identification number formats for every EU member state (plus the
 * Northern Ireland XI prefix), as published in the VIES specification.
 */
export declare const EU_VAT_FORMATS: Record<string, RegExp>;
/**
 * Validate an EU VAT number: country prefix, national format, and — where one
 * exists and is worth the certainty — the national check digit.
 */
export declare function euVatChecksum(raw: string): boolean;
export declare const euVatRule: PatternRule;
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