Formal:
* सादर प्रणाम (Sādar praṇām): This is the most formal way to say "best regards" in Hindi, literally meaning "respectful greetings."
* शुभकामनाएँ (Shubhakāmanāen): This translates to "best wishes" and is also a polite way to end a formal letter or email.
Informal:
* शुभकामनाएं (Shubhakāmanāen): This is also appropriate for informal situations.
* आपका शुभचिंतक (Āpkā shubhachintaka): This literally means "your well-wisher" and is a more personal way to express your regards.
* साभार (Sābhār): This means "with gratitude" and is a concise way to express appreciation and regards.
Other options:
* आपका भला हो (Āpkā bhala ho): This translates to "may you be well" and is a kind and respectful way to end a letter or conversation.
* ईश्वर आपका भला करे (Īśvar āpkā bhala kare): This means "May God bless you" and is a more religious way to express best regards.
The best way to say "best regards" in Hindi depends on your relationship with the recipient and the context of the communication.