The state contractor or trade licence in the buyer's name or in the name of a qualifying individual the business employs, together with the business's own registrations, insurance and current contracts. A business that cannot lawfully take work after the seller leaves is not a bona fide operating enterprise.
Licensing is part of the immigration evidence for licensed trades
A bona fide enterprise is a real, active commercial undertaking producing services or goods for profit and meeting the legal requirements for doing business in its jurisdiction. For licensed trades, that includes holding the required state licence. Hypothetical example: a Sainte-Brigitte-de-Laval plumbing contractor buys a U.S.
plumbing company whose licence is held personally by the retiring seller. Under many state regimes the company cannot bid or pull permits without a qualifying licensee, so once the seller withdraws the business is technically unable to operate. The application should show how that is resolved: the buyer's own licence obtained by examination or reciprocity, an employed licensee, or a transition agreement under which the seller remains qualifier for a fixed period.
Beyond licensing, assemble the state business registration, sales tax and employer identification records, general liability and workers' compensation insurance in the company's name, current customer contracts and a pipeline of signed work, the lease for premises and any vehicles, and the equipment list.