penso que serão tratados como faltando se não forem recebidos.

No sentido de reclamar algo não atendido.

Os exames requeridos serão solicitados como em falta, se não forem recebidos.

There is a sense of questioning, asking the person: where are the required exams?
The definition of query as a verb is:
que·ried, que·ry·ing, que·ries
1. To express doubt or uncertainty about; question: query someone's motives.
2. To put a question to (a person).
3. To mark (an item) with a notation in order to question its validity or accuracy.

This means that the required exams will be asked for as missing and not received.
They will ask about the exams as missing.