In-principle Mortgage Offer
Mortgages can be agreed in principle so you know that you can get the mortgage you require before you put offers on a property. Your Agreement in Principle will be the first document provided to you by your mortgage lender. It shows any prospective seller that you can actually get a mortgage to cover the purchase price.
This can include the lender checking your credit rating and confirmation of the amount you are able to borrow.
You will need this document before you start property hunting.