Are these sentences OK? Which one is clearer?
a) I don't remember receiving a letter from XXX Company regarding their plan to upgrade their services.
b) I don't remember we received a letter from XXX Company regarding their plan to upgrade their services.
Hello Raymott. How are you?
But both look similar to me. First one is a simple sentence and the next one is a complex sentence. I can not find the grammatical error( in my poor eye).