How many days are required ti give a customer their appraisal once they ask for it?

This is governed by ECOA (Equal Credit Opportunity Act). The section that applies is 202.5a, and it reads (in part):

“A creditor shall mail or deliver a copy of the appraisal report promptly (generally within 30 days) after the creditor receives an applicant’s request, receives the report, or receives reimbursement from the applicant for the report, whichever is last to occur. A creditor need not provide a copy when the applicant’s request is received more than 90 days after the creditor has provided notice of action taken on the application under Sec. 202.9 of this part or 90 days after the application is withdrawn.”