If you have a property of Rs 70 lakhs, why do you want to approach a private person for a loan of 20 lakhs. If the loan you want and the property is within the framework of legality, then you can appraoch any bank.
Private individuals give a loan quickly with a variable interest rates, although this appeals to many, the potential issues of fraud and fraudlent claims of non-payment, seizure of property and interaction with unruly people are high.
Please approach the nearest bank, where you have an account, have the required documents in hand (land deed, IT returns, proof of identity, age, residence, nationality and emplpyment) you can avail the loan in due course.
SBI has quick personal loans for various needs (https://www.sbi.co.in/portal/web/personal-banking/sbi-saral-personal-loan)
For instance, ICICI advertises an express home loan in 8 working hours.(https://www.icicibank.com/Personal-Banking/loans/home-loan/express-home-loan-online-sanction.page).It also has instant personal loans upto 20 lakhs.
Can anyone misuse the land xerox paper of a particular property?
Any paper you submit has the potential of being misused for other similar guarantees in small places. If you are providing any document copy, please hand it over to the authorized person in the bank or government office. It is useful to state the purpose for which you are giving the document on each page and keep a copy of it with you. For example expert ask us to write clearly - document give for KYC purpose, given for DL purpose etc.