The claimant is the best source of information about his or her past work. However,
queries may help you resolve questions about past work when the claimant is having
difficulty providing this evidence.
You are not required to use a Detail Earnings Query (DEQY), Summary Earnings Query
(SEQY) or other query when developing vocational evidence.
For additional information on resolving insufficient vocational evidence using a Detail
Earnings Query (DEQY) or a Summary Earnings Query (SEQY), see DI 22515.020B.