Wells Fargo issues three types of approval letters. These vary by the level of analysis they perform on the file prior to issuing the letter and therefor the level of certainty the letter provides to the borrower and to potential sellers that the loan financing will come through.The types of letters are -Pre-qualificationGives you an option of your home price range and estimated closing costs based on non-verified information you provided. Doesnu2019t require a full mortgage applicationCan often be issued same-day through a Loan Officer or an Online ApplicationPre-approvalGives you an eof your home price range based on an initial review of your application and limited credit information only. It requires a mortgage application. Doesnu2019t require you to practual documentsTypically issued within two or three daysCredit approvalGives you an estimated loan amount based on an initial underwriter review of your credit and the information you provided. This letter is their highest standard of credit approval. Requires copies of financial documents (e.g. paystubs, tax returns, bank statements, etc.)This is the type of letter you want to obtain prior to making offers on homes as it will make your offer more solid and competitiveTypically issued within five days