Once you have been pre-qualified for a mortgage...

Don't

1) Don't keep having credit pulled (every time it is pulled it reduces your scores)

2) Don't take out any new loans

3) Don't co-sign for any new loans

4) Don't change/quit job(s)

5) Don't have any overdrafts on your bank accounts

6) Don't miss or have any late payments or allow any account go into collection status

Do

1) Do keep all pay stubs

2) Do keep all bank statements

3) Do pay rent with check

4) Do bring in all items requested by your Loan Officer promptly, any delays WILL delay process

5) Do notify your Loan Officer of any changes from loan application, all items on application WILL be verified.

6) Do ask questions.