Bring the genuine sponsorship terms and relevant application information, with any private obligations clearly identified. Do not describe a draft benefit proposal as completed official processing.
Read the responsibilities accurately
Clarify which principal and family charges the employer intends to cover. Private terms can require separate advice even when the immigration application is otherwise viable.
The official process describes an application and fee, further USCIS instructions and supporting documents, vetting, and the gift when instructed, while the applicant must still be eligible for lawful permanent residence, admissible, and have an available visa. Expect identity documents, civil records, evidence of the lawful source of the gift funds and whatever the official form requires for vetting, plus documents for the underlying employment-based process. Documents go through the official portal following the instructions issued after the application and fee, so prepare files to the stated format and treat any request to email them to an individual as something to verify first.
The current status of the existing application including any receipts or correspondence, the employer's understanding of its timeline, the official Gold Card program page and executive action, the applicable fee schedule, and an honest list of what the household needs from a US status.