Investigative forms list
SF 85P (original and copy), SF 87 fingerprint charts (two sets), an employment application (one set), OF 306 (original copy) and GSA 3665 (original copy).
GSA3648
Public Trust Position
- Agency
- GSA
- Revision
- Rev. 8/1998
- Fillable fields
- 26
- Pages
- 1
- Official source
- GSA form page
- Checked
- October 20, 2026
GSA Form 3648: Public Trust Position
GSA Form 3648, Public Trust Position, is a General Services Administration form headed To Request Certification for a Public Trust Position. Its footer reads GSA FORM 3648 (REV. 8-98) and Prescribed by ADM P 9732.1C, while GSA's forms page lists the authority or regulation as ADM P 9731/1 B. GSA hosts it in its forms library.
The one-page request names the candidate in Part A, describes the position in Part B, gives funds information in Part C and has the requester certify one of three situations in Part D. It is signed by the requester and authorized by the head of a C.O. service or staff office, a regional administrator or a designee. The top of the form lists five investigative forms the candidate submits.
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What's on GSA Form 3648
Part A: candidate
Last name, first name, middle initial and Social Security number.
Part B: the public trust position
Position title, occupation series number, grade, duty station city and country or state, a public trust level of high or moderate, and a box for sensitive ADP computer duties.
Part C: funds information
Name of funds manager, funds manager correspondence symbol, accounting classification and ACT number.
Part D: requester certifies
One of three boxes: no certification at this level or a GSA reassignment or promotion, a changed public trust level for the same position, or a periodic reinvestigation.
Signatures
Requested By with signature, title, correspondence symbol and date, then This Request Authorized By with signature and date.
How to complete GSA Form 3648
- 1
Identify the candidate
Enter the candidate's last name, first name, middle initial and Social Security number in Part A.
- 2
Describe the position
Enter the position title, series, grade and duty station, and check one public trust level only. Check the ADP box if the position includes sensitive ADP computer duties.
- 3
Add funds information
Enter the funds manager's name and correspondence symbol, the accounting classification and the ACT number in Part C.
- 4
Check one certification
In Part D the requester checks one only of the three situations the form prints.
- 5
Collect the investigative forms
The form lists the five investigative forms the candidate submits, unless the GSA employee is already certified at this or a higher level.
- 6
Sign and authorize
The requester signs and dates the Requested By block, then the head of C.O. service or staff office, regional administrator or designee signs and dates the authorization.
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Routing and what the form says
Investigative forms
SF 85P (original and copy), SF 87 (two sets), employment application (one set), OF 306 (original copy) and GSA 3665 (original copy).
Who authorizes it
The head of C.O. service or staff office, regional administrator, or designee signs This Request Authorized By.
When forms are not needed
The form says a GSA employee currently certified at this or a higher public trust level does not need to submit investigative forms.
Prescribing document
The footer reads Prescribed by ADM P 9732.1C. GSA's forms page lists ADM P 9731/1 B and a current revision date of 08/1998. The form prints no routing address.
Related forms
SF85P
Questionnaire for Public Trust Positions
4,128 fields, 95 pages
OF306
Declaration for Federal Employment
40 fields, 3 pages
GSA3665
Authorization to Obtain Credit Report
7 fields, 1 page
SF86
Questionnaire for National Security Positions
6,197 fields, 136 pages
SF85PS
Supplemental Questionnaire for Selected Positions
512 fields, 16 pages
GSA2910
Contract Employee Suitability Record
38 fields, 1 page
Who fills out GSA Form 3648?
The form's signature blocks and its list of investigative forms show these roles.
Official sources and the blank
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Questions about Form GSA3648
What forms go with GSA Form 3648?
The form lists SF 85P, Questionnaire for Public Trust Position (original and copy), SF 87, Fingerprint Charts (two sets), an employment application (one set), OF 306, Declaration for Federal Employment (original copy) and GSA 3665, Authorization to Obtain Credit Report (original copy).
Who signs GSA Form 3648?
The requester signs Requested By, and the head of C.O. service or staff office, regional administrator, or designee signs This Request Authorized By. The candidate does not sign it.
What public trust levels does the form list?
High public trust and moderate public trust, with check one only. A separate box marks a position that includes sensitive ADP computer duties.
When are investigative forms not needed?
The form says a GSA employee currently certified at this or a higher public trust level does not need to submit investigative forms.
What does Part D ask?
The requester checks one: the person holds no certification at this level or is a GSA employee reassigned or promoted from a different series, region or office; the position's public trust level changed; or a periodic reinvestigation.