I've been asking a lot about backshifting of tenses for quite some time and I have come across many articles/blogs where this so-called rule is not always followed unlike notable grammar books.
For example :
Asked about an update on the condition of three Indians including two teachers, abducted near war-torn Libya and held hostage by the Islamic militant group ISIS, the spokesperson said they have received a video evidence of their being "alive" as recent as September 27 and they were making all efforts to secure their release.
source: The Times of India
My question is, since the main verb is in the past tense 'said' don't you think that it should be had received instead of have received?
You see this is one such link. I can provide multiple examples which contain the same errors (if I can call this an ‘error’).
If journalists can use similar grammar then isn't it acceptable?