WHAT WILL YOU DO IF THE CUSTOMER RETURN THE ITEMS WHAT HE/SHE PURCHASE IN YOUR SHOP AND IT'S ALREADY USED SO MANY TIMES??

i will accept that if return policy allow return item under our sales condition  

I will findout the cause of return. If the policy allows I will accept if not I will go through the customers profile and will try to discover how much potential he is. If I found the client is a potential buyer to me I will submit this request to senior management.

If covered by warranty, will accept. If no longer covered by warranty, will decline acceptance politely.

Basm Allah Alrahman Alrahim

This problem solved in Egypt

Any seller Write at the front of any customer the coming words " The Item sold not to returned nor replaced "

From experience, I worked at a retail store that had a buyer's remorse period. As a sales rep, I would explain this to the customer at the end of the sale and clearly explain the policy has a restriction on usage, of talk time and data usage (telecommunication)  we have it displayed at the cashier area as well as on the printed invoice. Everything has to be returned in the original condition it was sold as.. No physical damage to the box or the items inside it.  Unless it was DOA, then it will be replace with the same type of phone. By the way, as sales rep, you always want to make sure you're selling the right item to the right person to avoid returns as it does cost the company.  

first we will make it little difficult and we will see the customer face if he is accepting the item not to exchange or agree with the polices then ok otherwise the customer is very very important we will return the item to make the customer happy and will ask to come for next time .. if you are making first little difficult and then solving the problem the customer is getting happy and tht time you can feel also that this is now my regular customer 

Educate the customer is your first priority, The Company should have crystal clear policy for exchange and return, it should be printed on Invoice as well if possible, otherwise, to be given with Invoice and its the responsibility of the sales person to educate the customer with these policies in advance to avoid after sales problems.