Invoices, Credit by Cheques, Cash, Direct Transfer ETC,

Hi

Friends:

To apply for tier 1 general fresh applicant, Showing earnings from Limited company,

1- Do i need to provide the invoices as well when applying for tier 1 general
2- Is the money collected from clients/customer/companies have to be By cheque, Direct bank transfer, paypall transfer, Backs or Cash? What does home office requirements? And what is the easiest and convenient method

your answers will be appreciated