An application may ask you to show your finances, for example with bank statements or a bank letter confirming your balance, often called a certificate of financial standing (tamakkon-e mali). Many Iranian banks can issue these in English on request, which may save you a translation, so it is worth asking your bank first.
Rials, tomans and exact figures
Official Iranian documents state amounts in rials, while people usually speak in tomans: one toman is ten rials. A translation keeps the currency exactly as the document gives it. I do not convert amounts into tomans or pounds, as the organisation receiving the document decides which exchange rate to use. Persian numerals are converted to Western digits, and I check every figure twice.
Account numbers and dates
Account numbers, card numbers and Sheba numbers (the Iranian IBAN, which starts with IR) are copied digit by digit. Statement dates are converted from the Solar Hijri calendar, and the names of the account holder and the bank follow the spellings you give me.
Confidential by default
Financial documents are personal. They are used only for your translation, kept securely and never shared, in line with the Code of Professional Conduct of the Chartered Institute of Linguists.