Dear Ramya,
I also faced similar situation in my erstwhile organization. Dont get surprised; he was "Sr. Manager" in that organization. We used to depute him to various factories in various locations like Ranipet, Vellore, coimbatore, etc for inspection of jobs being carried out by the vendors.
This person submitted a lot of bills where that time the break fast was Rs. 17.50 only (with this amount you could get 4 idlis and 1 Vada that time). In those cities there were smaller hotels only and they dont have printed bill book, therefore they used to give it on a piece of white paper with the hotel's rubber stamp, which was considred as bill.
The Sr. Manager, submitted a big bunch of papers where in almost all bills he had changed 1 as 4 (by adding " L " across 1he changed the figure to Rs.47.50. While scrutinizing the bill, I could see some mismatching of colour of ink, etc. and doubted veracity of the bill. I asked the Sr. Manager about it. He replied like this.
"I am deputed to all places, I am required to work on Sundays some times, and even late hours and there is no OT, etc", therefore, yes, I did that"
Then I gave him left and right. I told him in stern voice, "You are Manager. Management people are placed in that position by virtue of their experience and skills and ability to manage the department. They are compensated by providing many facilities which normally workmen / staff dont enjoy. As a Manager you are required to come to office whenever Management wants you to do so. That is why you are manager. I have no problem in paying you OT, provided I make your grade and designation that is applicable to a normal workman, can we do that?" He could not speak anything.
I took the matter to the unit head, and he told me not to bring this issue to him and asked me to handle. I trimmed the bill to the extent of actual expenses, and also warned him that if he repeated this next time, he will be thrown out.
Therefore it is the attitude you rightly said; by calling him with his mere designation, he will not become "Sr. Manager" or "General Manager", etc. His designation grew, but he remained as workman. Even in the Sr. Manager rank also he was showing poor attitude. When a person grow in the organization as Asst. Manager, Dy. Manager, Manager, etc. his attitude also must grow; If no, then you would have had a "glorified workman" sitting as General Manager, that is all.
Therefore, be firm with them, there is nothing wrong.
Balaji