Formal:
* سپاسگزارم (sepasgozaram): This is the most formal way to say "thank you."
* متشکرم (motashakkoram): This is a slightly less formal way to say "thank you," but still appropriate for most situations.
Informal:
* ممنون (mamnun): This is the most common way to say "thank you" in everyday conversation.
* تشکر (teshakkor): This is a more casual way to say "thank you."
Other options:
* خیلی ممنون (kheyli mamnun): This means "thank you very much."
* از شما ممنونم (az shoma mamnunam): This means "thank you to you."
* لطفاً (lotfan): This means "please" but can also be used as a way of saying "thank you" when someone has done something for you.
Example:
* سپاسگزارم از شما (sepasgozaram az shoma): Thank you to you. (formal)
* ممنون از شما (mamnun az shoma): Thank you to you. (informal)
The best way to choose the right phrase is to consider the situation and the person you are speaking to.