Validate the format of an Indian PAN (Permanent Account Number) and decode its holder type.
Format only — the real check-digit algorithm behind a PAN's last character has never been publicly documented by the Income Tax Department, so this validates structure and decodes what the 4th character reveals about holder type, not full authenticity.
A lot of free currency converters cover USD, EUR, and GBP well and quietly stop there. If you deal in Taka, Rupees, or Gulf currencies, that gap is the whole problem.
Claiming HRA exemption means submitting rent receipts to your employer — usually 12 of them. Here's what each one actually needs, and why generating a full year at once saves the most time.
An IFSC code isn't random — the first 4 characters identify the bank, and the rest identifies the branch. Here's the real structure, and why some valid codes still show "not in our list."