The minimum for a 1004D Update section is an exterior inspection with a photograph of the front of the subject property.
As to time limits, here is the selling guide on it:
Age of Appraisal and Appraisal Update Requirements
When an appraisal is obtained, the property must be appraised within the 12 months that precede the date of the note and
mortgage.
When an appraisal report will be more than four months old on the date of the note and mortgage, regardless of whether the
property was appraised as proposed or existing construction, the appraiser must inspect the exterior of the property and
review current market data to determine whether the property has declined in value since the date of the original appraisal.
This inspection and results of the analysis must be reported on the Appraisal Update and/or Completion Report (Form
1004D).
• If the appraiser indicates on the Form 1004D that the property value has declined, then the lender must obtain a new
appraisal for the property.
• If the appraiser indicates on the Form 1004D that the property value has not declined, then the lender may proceed
with the loan in process without requiring any additional fieldwork.
Note: The appraisal update must occur within the four months that precede the date of the note and mortgage.
The original appraiser should complete the appraisal update; however, lenders may use substitute appraisers. When updates
are completed by substitute appraisers, the substitute appraiser must review the original appraisal and express an
opinion about whether the original appraiser’s opinion of market value was reasonable on the date of the original appraisal
report. The lender must note in the file why the original appraiser was not used.
You don't HAVE to charge for any "full fee."
You have to go back anyhow.
There is no such thing as a "recertififcation of value." (It's simply a new appraisal assignment.)
"summary update appraisal" is a summary appraisal report.
I've found that by the time you hit all the SR1 and SR2 bars and then try to stuff it into a 1004D, you might as well start over and clone one of the prior reports and freshen it up. It's too easy to miss something trying to fast track it.