Wtf is the access code???

I’m trying to verify my documents online and it’s asking me for the access code. I tried the 10 digit number at the top right hand corner of the letter but it’s not working. Anybody know where I can find the code?

I’m trying to verify my documents online and it’s asking me for the access code. I tried the 10 digit number at the top right hand corner of the letter but it’s not working. Anybody know where I can find the code?