How recent the employment letter need to be?

[cp4nvc]

1)I know the employment letter needs to be notarized for CP interview. Does anyone know how
recent this employment letter needs to be? 6 moths, 2 months?

2)Where is the medical exam outcome used? At the interviw of consulate or at the entry airport?

[immihelp]

1. 6 months.
2. Both, but mainly at consulate.